23 May 2007 -- The International Atomic Energy Agency (IAEA) says in a new report, issued to coincide with the expiration of a Security Council deadline for Tehran, that Iran continues to defy UN Security Council demands to halt uranium enrichment and has in fact expanded such work. The IAEA adds that the UN nuclear agency's ability to monitor nuclear activities in Iran has declined due to lack of access to sites. IAEA Director-General Muhammad el-Baradei urges constructive efforts on both sides and estimates that Iran could build a nuclear weapon within "three to eight years" -- if it chose that path.

17 May 2007 -- U.S. President George W. Bush says alongside outgoing British Prime Minister Tony Blair that the United States and Britain will seek new UN sanctions against Iran if it continues to resist calls for it to halt sensitive areas of its nuclear program. Bush is speaking the same day that a senior Iranian official says Tehran has expanded work on its nuclear facility at Natanz.

2 May 2007 -- A foreign affairs adviser to Supreme Leader Ayatollah Ali Khamenei tells a conservative daily that Iran is capable of the "mass production" of centrifuges used for enriching uranium.

28 April 2007 -- EU foreign policy chief Javier Solana calls on the United States to open a direct "channel of communication" with Iran on all topics, adding that it remains unclear "how far the U.S. is willing to engage" with Iran.

25-26 April 2007 -- EU foreign policy official Solana and Iranian nuclear negotiator Ali Larijani restart talks aimed at finding a nuclear compromise.

April 19, 2007 -- An IAEA official says in a leaked letter that Iran has assembled roughly 1,300 centrifuges into eight cascades and begun making nuclear fuel in its underground uranium-enrichment plant at Natanz. The Iranian ambassador to the IAEA says that "our enrichment is continuing under the safeguards of the IAEA, the inspectors and cameras are controlling all activities, and the report of how many centrifuge machines and the latest status of the activities in Natanz will be reported by the director-general."

11 April 2007 -- A spokeswoman for the International Atomic Energy Agency (IAEA) predicts that Iran will have the capacity to build its own nuclear bomb in four to six years, leaving time for diplomatic efforts to counter any potential danger.

10 April 2007 -- Foreign Minister Manuchehr Mottaki says Iran will not accept any suspension of its uranium-enrichment activities and urges world powers to accept the "new reality" of the Islamic republic's nuclear program.

9 April 2007 -- Iran says the country's uranium-enrichment program is ready to operate on an "industrial level."

24 March 2007 -- The Security Council unanimously approves a resolution broadening UN sanctions against Iran for its continuing failure to halt uranium enrichment. Iranian officials call the new measures "unnecessary and unjustified." Officials confirm that Iranian President Mahmud Ahmadinejad canceled a New York visit in which he vowed to address the Security Council ahead of the sanctions vote; Tehran blames U.S. delays over visas for Ahmadinejad's entourage.

20 March 2007 -- Russia and Iran reject a report in "The New York Times" of March 19 suggesting that Moscow told Tehran it would withhold fuel for the Bushehr nuclear plant unless Iran complied with UN demands to suspend uranium enrichment.

15 March 2007 -- Diplomats say the five permanent UN Security Council members plus Germany have agreed on a draft resolution imposing new sanctions on Iran for defying demands to suspend uranium enrichment.

12 March 2007 -- The Russian company building Iran's first nuclear power station at Bushehr, Atomstroiexport, announces that the facility's launch will be postponed due to a two-month payment delay preventing the delivery of uranium fuel.

11 February 2007 -- The head of Iran's Atomic Energy Organization, Gholam Reza Aghazadeh, says the Russian supplier for its planned Bushehr nuclear plant has signaled a delay over delinquent payments. He suggests the real problem lies on the Russian side and that he hopes the plant is not being "politicized."

8 March 2007 -- The United Nations' nuclear guardian, the IAEA, votes unanimously to cut almost half its aid programs to Iran as part of the UN sanctions targeting Tehran's nuclear program. The Iranian ambassador to the International Atomic Energy Agency, Ali Asghar Soltanieh, counters that the move will not affect his country's enrichment work.

5 March 2007 -- IAEA Director-General Muhammad el-Baradei says Tehran has not convinced the UN nuclear watchdog of the peaceful nature of Iran's nuclear program and an investigation into that program remains at a "stalemate" until Iran provides full cooperation.

26 February 2007 -- The United States says it is seeking "incremental" steps to pressure Iran to suspend uranium enrichment.

25 February 2007 -- President Ahmadinejad says Iran's nuclear program is unstoppable and, in a show of its growing technical prowess the same day, Iran reportedly fires a rocket into space for the first time.

23 February 2007 -- U.S. Vice President Dick Cheney says Washington will "do everything" it can to deprive Iran of nuclear weapons and has not taken "any options off the table," spurring further speculation that U.S. officials would consider military intervention.

22 February 2007 -- The IAEA issues a report confirming that Iran has failed to halt uranium-enrichment activities, as demanded by the UN Security Council. The report also notes that Iran has expanded the program, installing two cascades with many dozens of centrifuges at Natanz and nearing completion on two more cascades.

21 February 2007 - The UN Security Council's 60-day deadline ends for Iran to halt uranium enrichment. Iranian parliamentary speaker Gholam Ali Hadad Adel warns that a delay by Russia in completing the Bushehr nuclear plant would harm bilateral ties. His comments came after Russian nuclear officials' claim that lagging payments from Tehran could delay start-up of the facility.

17 February 2007 -- Supreme Leader Ayatollah Ali Khamenei says "nuclear energy is the future and destiny" of Iran, and notes that its oil and gas reserves "would not last forever."

11 February 2007 -- President Mahmud Ahmadinejad says Iran wants talks to resolve its nuclear dispute and will cooperate with the IAEA, but Tehran will not suspend uranium enrichment. Iranian officials also say they will allow IAEA cameras at its underground nuclear facility at Natanz. French Foreign Minister Philippe Douste-Blazy calls Ahmadinejad's offer of talks while continuing enrichment "totally unacceptable."

8 February 2007 -- Supreme Leader Ayatollah Ali Khamenei says that while he does not expect anything as "irrational" as an attack on Iran, his country would strike back at U.S. interests around the world if it were attacked. A spokesman for the White House National Security Council dismisses Khamenei's comment as "unprovoked" and says President George W. Bush "has made it clear we have no intention of going to war with Iran." Bush's chief spokesman says flatly, "We are not invading Iran."

1 February 2007 -- The French president's office essentially retracts a recent suggestion by Jacques Chirac that a nuclear-armed Iran would not be "very dangerous," calling such an eventuality unacceptable and describing Iran's nuclear program as "opaque and therefore dangerous for the region."

31 January 2007 -- Iran's embassy in Moscow denies a British newspaper report that North Korea is giving it technical help to prepare an underground nuclear test similar to the one carried out by Pyongyang in October.

28 January 2007 -- After talks with Iranian Foreign Minister Manuchehr Mottaki, visiting Russian security chief Igor Ivanov says "Russia is determined" to finish Bushehr nuclear power plant, in southern Iran, on time.

26 January 2007 -- IAEA chief Muhammad el-Baradei warns that a military strike on Iran's nuclear facilities could have "catastrophic consequences" and would only encourage Iran to develop an atomic bomb. "Are you going to bomb the knowledge?" he asks.

22 January 2007 -- Foreign Minister Manuchehr Mottaki confirms reports that 38 UN nuclear inspectors have been prohibited from entering the country in a list that was reportedly delivered to the IAEA; the next day, Tehran stresses that cooperation with the IAEA continues, despite the ban. The European Union urges all countries to enforce the recently passed UN sanctions against Iran.

12 January 2007 -- Outgoing U.S. intelligence chief John Negroponte tells the U.S. Senate Select Committee on Intelligence that Iran is capable of weathering shocks to its economy, noting record oil revenues and manageable debt.

10 January 2007 -- The United States urges China to reconsider a $16 billion energy deal with Iran on the development of oil and gas fields whose outlines were affirmed in a memorandum of understanding in December 2006.

27 December 2006 -- Iran's parliament passes a bill that obliges the government to "revise its cooperation level" with the UN's nuclear watchdog and, at the same time, continue to pursue the country's civilian nuclear program.

25 December 2006 -- President Ahmadinejad responds to UN Security Council Resolution 1737 by saying the sanctions will have "no impact" on Iran's nuclear program.

23 December 2006 -- The 15-member UN Security Council unanimously adopts a binding resolution that calls on Iran to suspend its uranium-enrichment activities and to comply with its IAEA obligations. Resolution 1737 directs all states to prevent the supply or sale to Iran of any materials that could assist its nuclear or ballistic-missile programs. It also imposes an asset freeze on key companies and individuals named by the UN as contributors to Iran's nuclear and missile programs. Iran rejects the move as an "invalid" and "extralegal act" outside the bounds of the UN's charter.

6 December 2006 -- Russian Defense Minister Sergei Ivanov says that imposing overly tough sanctions on Iran could draw out the nuclear dispute.

5 December 2006 -- Ahead of a major-powers meeting on the Iranian nuclear issue, Iranian President Ahmadinejad warns the international community that "if you continue making efforts to halt the progress of Iran's nuclear program [or] if you take any step against Iran's rights -- either in propaganda or international bodies -- the Iranian nation will consider this a hostile act."

24 November 2006 -- IAEA Director-General Muhammad el-Baradei says Iran has pledged to give international inspectors new access to records and equipment from two nuclear sites, as well as environmental samples, from Lavizan and Natanz.

23 November 2006 -- UN diplomats are quoted as saying the IAEA's board of governors shelved Iran's bid for technical aid for a heavy-water reactor project at Arak over fears it could yield weapons-grade plutonium.

20 November 2006 -- President Mahmud Ahmadinejad reportedly says Tehran wants 60,000 centrifuges to enrich uranium to meet its nuclear-fuel needs within a year. He also is quoted as saying that Israel is currently incapable of launching an effective military attack against Iran's nuclear sites.

17 November 2006 -- Russian Foreign Minister Sergei Lavrov says the IAEA should lead efforts to resolve the standoff over Iran's nuclear program, rather than UN Security Council. He suggests that "it was agreed from the beginning that we would seek through the Security Council the swift resumption of negotiations with Iran, and not the punishment of Iran."

15 November 2006 -- U.S. Ambassador to the UN John Bolton says no progress was made in talks on the Iranian nuclear issue involving himself and envoys from Russia, China, Britain, France, and Germany.

14 November 2006 -- Iranian President Mahmud Ahmadinejad predicts that Iran will celebrate its "full nuclearization" by the end of the year that concludes in March, and suggests his country's right to pursue nuclear technology will soon be acknowledged internationally. Reports also emerge suggesting the IAEA will soon report that Iran continues to enrich uranium, spurn cooperation over its nuclear program, and that UN inspectors are pursuing their discovery of unexplained traces of plutonium and highly enriched uranium at a waste facility in Iran with officials in Tehran.

13 November 2006 -- U.S. President George W. Bush says after talks with visiting Israeli Prime Minister Ehud Olmert that "there has to be a consequence" if Iran proceeds with its uranium-enrichment program in defiance of international pressure.

12 November 2006 -- An Iranian Foreign Ministry spokesman says Tehran is pressing ahead with plans to expand its program to enrich uranium and remains determined to install 3,000 centrifuges by March 2007.

11 November 2006 -- Foreign Minister Sergei Lavrov says Russia wants to restart nuclear talks between Iran and the five permanent UN Security Council members plus Germany.

10-11 November 2006 -- Iranian nuclear negotiator Ali Larijani emerges from talks in Moscow divulging no details but saying Iran is ready for dialogue to resolve any disputes over its nuclear program; he reportedly meets with President Vladimir Putin on the second day of his visit.

8 November 2006 -- Britain, China, France, Russia, the United States, and Germany are reportedly still deadlocked after a meeting at the UN to discuss a European draft resolution to curtail Iran's nuclear program and amendments offered by Moscow and Washington. Russian UN Ambassador Vitaly Churkin says there is still a "considerable gap" separating the parties.

5 November 2006 -- Iranian Foreign Ministry spokesman Mohammad Ali Hosseini says Tehran is ready to consider negotiating with the United States on regional issues, including Iraq, if Washington requests it.

4 November 2006 -- Russia stresses that any punitive measures the UN Security Council agrees to impose on Iran "should have a precise limitation on the period for their being in effect."

3 November 2006 -- Russian Foreign Minister Sergei Lavrov says after a meeting in Brussels that a European draft UN resolution on Iran sanctions "goes far beyond [our] agreements."

1 November 2006 -- Foreign Minister Lavrov says a draft UN resolution authored by France, Germany, and Britain to impose sanctions on Tehran over its nuclear ambitions would isolate Iran and Moscow "cannot support measures that are aimed at isolating Iran from the outside world."

31 October 2006 -- Russian Security Council Secretary Igor Ivanov says his country has no information "that would suggest that Iran is carrying out a nonpeaceful [nuclear] program," adding that "the possibilities for continuing political discussion...have not been exhausted."

30 October 2006 -- Iran's president, Mahmud Ahmadinejad, says Tehran would make an "appropriate and firm" response to UN sanctions, adding that "the Iranian nation is standing strong and it will not retreat even one bit from its nuclear rights."

28 October 2006 -- Mohammad Ghannad, the deputy head of Iran's Atomic Energy Organization, says that Tehran has stepped up its uranium-enrichment work.

26 October 2006 -- Russian Foreign Minister Lavrov criticizes a draft UN resolution providing for a form of sanctions against Iran.

24 October 2006 -- Anonymous diplomatic sources at the UN say major world powers remain split over the details of a draft Security Council resolution to respond to Iran's continuing nuclear work.

21 October 2006 -- Foreign Minister Lavrov says Moscow opposes any attempt to use the Security Council to punish Iran over its nuclear program.

18 October 2006 -- EU foreign ministers express backing for gradual sanctions against Iran's nuclear program.

16 October 2006 -- In his country's first reaction to sanctions targeting North Korea for its apparent nuclear-weapons test on October 9, President Ahmadinejad dismisses the UN Security Council as a tool for "hegemony" and "intimidation."

4 October 2006 -- EU foreign policy chief Solana says four months of intensive talks have brought no agreement on suspension of Iran's sensitive nuclear activities, and he adds that the dialogue cannot continue indefinitely.

3 October 2006 -- U.S. Secretary of State Condoleezza Rice suggests the international community will have no choice but to impose sanctions on Iran if it refuses to suspend its uranium-enrichment efforts.

26 September 2006 -- Russia and Iran agree on a September 2007 launch of Iran's nuclear power plant at Bushehr, with electricity production to begin two months later.

25 September 2006 -- Iranian Foreign Minister Manuchehr Mottaki says nuclear talks with European negotiators are "on track" and a diplomatic solution is possible.

22 September 2006 -- Iranian Vice President Parviz Davudi warns that Iran's armed forces will strike back "like lightning" against any attack on the country and destroy "the enemy."

21 September 2006 -- Iranian President Mahmud Ahmadinejad says nuclear talks with the EU are "on the right path." He adds that he is "at a loss" as to what more Tehran can do to provide guarantees that it is no trying to develop nuclear weapons.

20 September 2006 -- U.S. Undersecretary of State Nicholas Burns says six major world powers have agreed to back further EU talks with Iran, but he hints that Washington will push for sanctions if Tehran continues sensitive nuclear work. Burns says an unspecified deadline has been set for the current EU-Iranian talks to achieve results.

19 September 2006 -- U.S. Secretary of State Condoleezza Rice today urged other permanent members of the UN Security Council not to allow their "credibility to decline" by failing to act against Iran.

17 September 2006 -- German Foreign Minister Frank-Walter Steinmeier proposes the creation of shared, U.N.-monitored uranium-enrichment facilities as an alternative to individual countries acquiring their own enrichment technology.

14 September 2006 -- To "set the record straight," the IAEA protests in a letter to U.S. officials that a recent U.S. report describing Iran's nuclear program as a strategic threat contains "erroneous, misleading, and unsubstantiated information." The IAEA dismisses as untrue a claim that Iran is enriching uranium to weapons-grade levels; Iran is enriching to 3.6 percent, not the 90 percent needed for nuclear weapons.

13 September 2006 -- A spokeswoman for EU foreign-policy chief Javier Solana says a second round of EU-Iranian nuclear talks slated for the following day have been postponed. The same day, UN Secretary-General Kofi Annan suggested that Tehran's position on the nuclear issue might have softened.

11 September 2006 -- Muhammad el-Baradei, the head of the International Atomic Energy Agency (IAEA), says he is "encouraged that there is ongoing dialogue" over Iran's nuclear activities.

9-10 September 2006 -- Two days of "productive" EU-Iranian talks end inconclusively, with a vow to meet again the following week.

September 8, 2006 -- U.S. Undersecretary of State Nicholas Burns says the UN Security Council should begin drafting a resolution in the next week on sanctions over Iran's nuclear program. He notes that there is still no consensus on what type of sanctions might be imposed.

5 September 2006 -- The Iranian parliament's Commission for National Security and Foreign Policy approves the outlines of a bill to suspend entry to Iran of UN inspectors in the event of punitive measures by the UN Security Council.

3 September 2006 -- Visiting UN Secretary-General Kofi Annan says President Ahmadinejad reaffirms that Tehran wants to find a negotiated solution to its nuclear standoff with the world but also rejects any suspension of its uranium-enrichment program prior to talks.

1 September 2006 -- Former Iranian President Mohammad Khatami arrives in the United States ahead of a UN conference and several public appearances that make him the most senior Iranian official to visit the United States outside the strict framework of a UN event in more than two decades.

31 August 2006 -- The IAEA reports to the Security Council that Iran has continued to enrich uranium despite UN calls for it to stop its nuclear activities by August 31, adding that its own investigations have been frustrated by a lack of cooperation from Iran.

29 August 2006 -- President Mahmud Ahmadinejad says he thinks the UN Security Council will not punish Iran, but says his country "will not bow to threats and ultimatums." He says Tehran's response to the recent international deadline presents a "very exceptional opportunity" to resolve the nuclear dispute. Ahmadinejad also proposes a live, televised debate with U.S. President George W. Bush.

27 August 2006 -- President Mahmud Ahmadinejad launches a new phase in Iran's nuclear development with the formal opening of a heavy-water-production plant at Arak. Critics fear the plant will eventually be able to produce weapons-grade plutonium, and the IAEA will later shelve an Iranian request for international technical assistance with the plant. Chief nuclear negotiator Ali Larijani says Iran is determined to produce its own nuclear fuel.

22 August 2006 -- Iran responds to a self-imposed deadline by saying an international proposal to curb its disputed nuclear program has "fundamental and serious ambiguities" but adds that Tehran is ready for "serious talks." Iranian officials essentially ignore the demand by the UN Security Council's permanent members plus Germany that Iran halt uranium enrichment.

16 August 2006 -- Iranian Foreign Minister Manuchehr Mottaki says Iran is willing to discuss its uranium-enrichment program, although he says international calls for its suspension are "illogical."

4 August 2006 -- The United States slaps sanctions on seven international arms dealers, including two major Russian companies, for allegedly providing banned technology to Iran.

31 July 2006 --The UN Security Council adopts Resolution 1696, calling for Iran to suspend uranium-enrichment activites by August 31 or face the possibility of economic sanctions.

18 July 2006 -- The unfolding crisis between Israel and Hizballah in Lebanon delays UN consideration of Iran's nuclear program.

16 July 2006 -- Iranian Foreign Ministry spokesman Hamid Reza Assefi says the international incentives package is "an acceptable basis" for further negotiations.

12 July 2006 -- A meeting of foreign ministers of the permanent UN Security Council members plus Germany in Paris decides to refer Iran's nuclear program back to the Security Council for possible sanctions.

11 July 2006 -- The EU announces that it is disappointed with progress in Brussels talks with Iran over the international incentives package.

30 June 2006 -- Iranian Foreign Minister Manuchehr Mottaki says Iran will not respond to the international incentives package before August, despite U.S. and EU pressure for Tehran to answer by July 5.

16 June 2006 -- Iranian President Mahmud Ahmadinejad calls a package of international incentives aimed at persuading Tehran to abandon sensitive nuclear activities "a step forward" and says he has "asked my colleagues to carefully consider it."

15 June 2006-- Russian President Putin says after a meeting with President Ahmadinejad on the sidelines of a Shanghai Cooperation Organization summit that the talks left him with a "very positive impression." Putin says Ahmadinejad says Iran is "positively" assessing the package of nuclear incentives. Putin also says any country has the right to use nuclear technology so long as it "does not arouse concerns of the international community on the [nuclear] nonproliferation issue."

12 June 2006 -- Supreme National Security Council chief and top nuclear negotiator Ali Larijani says of the incentives offer that "this proposal contains some positive points, such as the nuclear reactor for Iran." Larijani's comments come as the IAEA board is launching a meeting at which it will discuss the Iranian nuclear standoff.

9 June 2006 -- Austrian Chancellor Wolfgang Schuessel, who holds the European Union's rotating presidency, says Iran has until the July summit of the Group of Eight leading industrialized countries to respond to an offer of incentives aimed at resolving the crisis over its nuclear program.

8 June 2006 -- A new report by the UN nuclear agency says Iran is continuing to enrich uranium and indicates that nuclear inspectors have made little progress on shedding light on worrying aspects of Tehran's nuclear activities in the past.

6 June 2006 -- EU High Representative for Common Foreign and Security Policy Javier Solana meets in Tehran with senior Iranian government officials and presents them with fresh proposals aimed at persuading Iran to abandon its uranium-enrichment program. The proposals have been agreed on by the five permanent members of the UN Security Council -- Britain, China, France, Russia, and the United States -- plus Germany.

15 May 2006 -- The EU says it is ready to offer Iran sophisticated civilian nuclear technology as part of an "exceptional" new package of trade and technical incentives designed to halt Tehran's suspected military nuclear program. EU High Representative for the Foreign and Security Policy Javier Solana says it is "fundamental" that Iran cease its enrichment activities.

17 May 2006 -- President Mahmud Ahmadinejad says in a televised speech that Tehran will reject a European offer of incentives to give up uranium enrichment, saying acceptance of the proposal would be tantamount to swapping nuts and chocolate for gold.

28 April 2006 -- The IAEA sends its report to the UN Security Council faulting Iran for failing to meet demands to suspend uranium enrichment and improve cooperation with nuclear inspectors. The report marks the end of the Security Council's 30-day deadline for demonstrating that its nuclear activities are only for civilian purposes. U.S. President Bush expresses a desire to find a peaceful resolution to the crisis.

27 April 2006 -- U.S. Secretary of State Condoleezza Rice says on the sidelines of a NATO meeting that the UN Security Council "has to act" in order to remain credible if Iran ignores the deadline for halting uranium enrichment. Iranian President Ahmadinejad says Iran will not comply.

25 April 2006 -- Top nuclear negotiator Ali Larijani says Iran will cut ties with the IAEA if the UN Security Council imposes sanctions over Iran's nuclear program.

24 April 2006 -- Iranian President Ahmadinejad says Iran's nuclear activities are transparent and he does not think pursuing uranium enrichment will lead to international sanctions.

23 April 2006 -- Foreign Ministry spokesman Hamid Reza Assefi says Iran's uranium-enrichment and nuclear-research activities are "irreversible."

19 April 2006 -- U.S. Secretary of State Rice says Washington is prepared to use political, economic, and other measures to dissuade Iran from developing a nuclear weapon, adding that it has "diplomatic tools" at its disposal.

12 April 2006 -- IAEA head Muhammad el-Baradei visits Iran to discuss the country's nuclear program with senior Iranian officials but few details emerge. El-Baradei says he cannot confirm Iranian claims that its scientists have enriched uranium to fuel power stations.

11 April 2006 -- Iranian President Ahmadinejad announces, using Islamic rhetoric in a special ceremony seemingly designed to attract popular support, that Iran has completed the nuclear-fuel cycle. The achievement places Iran among the "nuclear countries of the world."

2 April 2006 -- Ali Asghar Soltaniyeh, Iran's ambassador to the IAEA, claims that the more the Security Council is involved, the worse the situation will become.

30 March 2006 -- The five permanent UN Security Council members -- the United States, Britain, France, China, and Russia -- and Germany warn Iran that it must heed the UN statement insisting that it stop its nuclear work or face isolation. Iranian Foreign Minister Manuchehr Mottaki dismisses the warning; other officials will also reject the Security Council warning. IAEA Director-General Muhammad el-Baradei urges Iran to be more forthcoming but also says he thinks sanctions at this time would be unwise.

29 March 2006 -- UN Security Council unanimously adopts statement calling on Tehran to halt its nuclear work.

28 March 2006 -- Russian Defense Minister Sergei Ivanov demands that Tehran say "unambiguously" whether it will accept or reject Russia's offer to enrich uranium to supply an Iranian nuclear program. Reports emerge that the Iranian Embassy in Moscow has proposed the establishment -- with the involvement of other countries -- of a nuclear-fuel production center in Iran.

25 March 2006 -- Syrian First Vice President Faruq al-Shara and Iranian Foreign Minister Manuchehr Mottaki decry Israel's nuclear program as a threat to regional peace.

21 March 2006 -- Iranian Supreme Leader Ayatollah Ali Khamenei says "there is no problem with" direct talks rumored to have been planned between Iran and the United States over the situation in Iraq, as long as those discussions lead Washington to understand Tehran's position. Iranian sources have been quoted as insisting the talks must be limited to the topic of Iraq.

20 March 2006 -- U.S. President Bush says he hopes "to solve this [nuclear] issue diplomatically" with a "united message" from the five permanent Security Council members but adds that Iranian officials' threats against "our strong ally, Israel," are "a threat to world peace." Bush adds that "we will use military might to protect our ally, Israel."

16 March 2006 -- British Prime Minister Tony Blair insists the international community "cannot walk away" from the Iranian nuclear issue and says there was no point turning to the UN "unless something is going to follow as a result of that."

14 March 2006 -- U.S. Ambassador to the UN John Bolton says informal discussions on Iran's nuclear program now include all 15 members of the Security Council and adds that the draft of a possible resolution has been distributed. The same day, U.S. President Bush announces to Congress that he has extended bilateral economic sanctions against Iran by another year. Bush says Iranian government policies and actions pose a continuing threat to the U.S. economy, foreign-policy goals, and national security.

12 March 2006 -- Tehran says a Russian proposal to move Iran's enrichment program to Russia is "off" the agenda and that Iran will not consider any proposal that does not guarantee the country's "right to nuclear research."

8 March 2006 -- IAEA head Muhammad el-Baradei says at the end of a three-day meeting that the agency will forward his report -- which accuses Iran of withholding information, possessing plans linked to nuclear weapons and refusing to freeze uranium enrichment -- to the UN Security Council. El-Baradei urges Iran to "be transparent" and "take confidence-building measures." Iranian President Mahmud Ahmadinejad vows in a televised speech that "Iran will not give in to any political pressure, [will] make no compromise, and will go to the end of the line."

7 March 2006 -- Undersecretary of State Nicholas Burns says Tehran has "crossed the international red line" with its activities to enrich uranium, adding that unless Iran suspends all nuclear activities, the Security Council must get involved.

3 March 2006 -- European talks with Iranian officialsfailto provide a nuclear compromise ahead of the IAEA's March 6-8 meeting.

2 March 2006 -- Reports say Russian-Iranian talks in Moscow fail to produce a "decisive breakthrough" on the basis of a Russian proposal to enrich uranium for Iran. Iranian nuclear negotiator Ali Larijani pledges that his country will not stop its enrichment activities.

26 February 2006 -- The head of Iran's Atomic Energy Organization, Gholam-Reza Aqazadeh, says Iran and Russia have reached basic agreement on a Russian proposal to host Iran's uranium-enrichment program.

14 February 2006 -- Ten days after the IAEA voted to report it to the UN Security Council over its nuclear activities, Iran confirms that it has resumed work on uranium enrichment.

5 February 2006 -- Foreign Minister Manuchehr Mottaki announces the end of Iran's voluntary cooperation with the IAEA.

4 February 2006 -- IAEA governing board votes overwhelmingly to report Iran to the UN Security Council over its nuclear activities.

30 January 2006 -- Foreign ministers of the five permanent members of the United Nations Security Council (China, France, Russia, the United Kingdom, and the United States), plus Germany, concur that Iran should be reported to the council for its nuclear activities, but action should be delayed until after the March meeting of the IAEA governing board. Tehran counters with a threat to end all cooperation with the IAEA and adherence to international accords, as called for by an earlier parliamentary decision.

24 January 2006 -- Supreme National Security Council Secretary Ali Larijani visits Moscow to discuss a December proposal that nuclear fuel enriched in Russia will be shipped to Iran for use, then returned to Russia for storage. Larijani indicated a lack of enthusiasm on 27 January, telling reporters at Tehran's Mehrabad Airport that Moscow's idea does not conform fully with Tehran's needs. He said the proposal should be revised in future discussions. The next round of Iran-Russia talks is scheduled for 16 February.

11 January 2006 -- Leaders from the United States, Russia, and EU countries roundly condemn Iran for its resumption of nuclear-fuel activities. The leaders renew calls for referring the dispute to the UN Security Council.

10 January 2006 -- Iran resumes nuclear research, triggering Western condemnation. Mohammad Saidi, a deputy head of Iran's Atomic Energy Organization, says that Iran agreed with the IAEA on 9 January for IAEA inspectors in Iran to "reopen those places on which we agreed." Resumed activities, he said, are merely in "research, and nothing more. We distinguish between fuel-related research and the production of fuel." On the same day, IAEA Director-General Muhammad el-Baradei informs the IAEA governing board that Iran intends to begin "small-scale" uranium enrichment at its Natanz facility.

3 January 2006 -- Iranian Atomic Energy Organization deputy head Mohammad Saidi told state television that Tehran will resume its nuclear-fuel research. The Iranian government confirmed the report on 9 January.

25 December 2005 -- Tehran formally rejects an offer from Moscow to enrich uranium for its nuclear program in Russia. Iranian officials insist upon Iran's right to enrich uranium on its own soil.

24 November 2005 -- A meeting of the IAEA Board of Governors postpones any action on Iran's nuclear program. The move is aimed at reopening negotiations on a Russian proposal for a compromise that would allow Iran to enrich uranium, but only in Russia and under strict controls.

15 October 2005 -- U.S. Secretary of State Condoleezza Rice holds talks in Moscow with Russian Foreign Minister Sergei Lavrov. The two officials disagree over Iran's nuclear program, with Lavrov maintaining the Iran has the right to develop nuclear energy in accordance with the Non-Proliferation Treaty.

12 October 2005 -- The EU issues a statement calling on Iran to continue negotiations with the EU-3 and to improve its human-rights record.

7 October 2005 -- IAEA head Muhammad el-Baradei and the International Atomic Energy Agency are jointly awarded the Nobel Peace Prize, in part for their work in mediating the conflict over Iran's nuclear program.

28 September 2005 -- Iran's parliament votes to expedite a bill that would end voluntary IAEA inspections of Iran's nuclear facilities.

25 September 2005 -- Tehran rejects the IAEA report and Iranian Foreign Minister Manuchehr Mottaki says his country remains committed to the Non-Proliferation Treaty.

24 September 2005 -- The IAEA governing board adopts a resolution that says the nuclear watchdog, "after two and a half years of intensive inspections," remains unclear on "some important outstanding issues." "Iran's full transparency is indispensable and overdue," it continues, adding that the agency questions Iran's motives for not declaring certain factors and "pursuing a policy of containment." The resolution does not refer Iran to the UN Security Council, but it does hint at this possibility by noting that some of the outstanding questions are "within the competence of the Security Council. The resolution was approved by a vote of 22 in favor, 1 against (Venezuela), and 12 abstentions. (See also, "Iranian Government Reacts To IAEA Nuclear Resolution.")

17 September 2005 -- President Mahmud Ahmadinejad announces the Iranian position on the nuclear issue at the UN General Assembly. "Peaceful use of nuclear energy without possession of nuclear fuel cycle is an empty proposition," he said. He expressed concern about the creation of a nuclear "apartheid," and he calls for a nuclear-weapons-free Middle East. "In accordance with our religious principles, pursuit of nuclear weapons is prohibited," Ahmadinejad said. As a confidence-building measure, Ahmadinejad said, Iran is willing to partner with public and private groups in its uranium-enrichment program. He added that Iran will continue to cooperate with the International Atomic Energy Agency. However, he dismissed promises that other countries will be the source of fuel for the Iranian nuclear program.

2 September 2005 -- Members of the IAEA Board of Governors receive a report on Iran's nuclear activities. It notes that Tehran has been less than forthcoming about some of its activities and has been reluctant to provide access to some sites. "In view of the fact that the agency is not in a position to clarify some important outstanding issues after two and a half years of intensive inspection and investigation, Iran's full transparency is indispensable and overdue," the report states. "Given Iran's past concealment efforts over many years...transparency measures should extend beyond the formal requirements...and should include access to individuals, documentation on procurement, and dual-use equipment."

August 2005 -- Iran rejects the EU proposal, which includes commercial and political cooperation in exchange for Iran's forsaking efforts to develop nuclear fuel. (See also, "IAEA Draft Resolution Expresses 'Serious Concern' Over Iran's Nuclear Activities.") The European proposal included an offer to help build a light-water reactor and then provide fuel for it. (Fuel for a light-water reactor is cannot be used for weapons.)

July 2005 -- President Khatami says on 19 July that Iran will not forsake the right to produce nuclear fuel and the enrichment suspension will not be permanent. He says on 27 July that activities at the Isfahan UCF could resume in days, depending on the concessions proposed at an Iran-EU meeting. "The system has already made its decision to resume Isfahan's activities," he said.

May 2005 -- Iranian officials repeat that activities at Isfahan UCF will resume "soon," but then Tehran agrees to wait for two months after Iranian and EU officials meet in Geneva.

April 2005 -- Supreme National Security Council Secretary Hojatoleslam Hassan Rohani said on 30 April -- after the previous day's negotiations in London with British, French, and German representatives failed to yield substantive results -- Tehran is considering resumption of activities at the Isfahan uranium conversion facility (UCF).

February 2005 -- Iran and Russia sign an agreement on the return of spent nuclear fuel to Russia for reprocessing and storage. This measure is intended to eliminate the possibility that the materials will be used for making nuclear weapons. Fuel delivery will take place six months before the facility's completion, which should occur at the end of 2006.

January 2005 -- IAEA inspectors visit the Parchin military site, which is southwest of Tehran, to investigate allegations that the military tested conventional explosives that can be used to detonate nuclear weapons there.

December 2004 -- Talks between Iran and the EU-3 over political and economic concessions, in exchange for Iran making its enrichment suspension permanent, are scheduled to begin on 13 December (see "How Close Is Iran To The Bomb?").

November 2004 -- Iran holds talks in Paris with the EU-3. On 14 November, Iran signs an agreement to suspend uranium enrichment. The Europeans offer a series of political and economic concessions in exchange. But at an IAEA board of governors meeting from 25-29 November -- which was set to pass a resolution endorsing the deal and agreeing to monitor it -- Iran insists on an exemption for 20 centrifuges for research purposes. Iran eventually backs down, but demands -- and wins -- key changes softening the resolution in exchange. Most importantly, the resolution describes the enrichment freeze as a voluntary, rather than the legally binding commitment as both the United States and the EU sought. (See also, "The Iranian Nuclear Imbroglio.")

October 2004 -- The EU-3 again calls for Iran to suspend all uranium-enrichment activities to avoid its case being brought before the Security Council. The Europeans offer economic and political incentives in exchange. The Iranian parliament passes a bill approving the resumption of enrichment activities.

September 2004 -- An IAEA report calls Iran's claims about its nuclear program "plausible," but voices concern over Iran's decision to resume large-scale production of the feed material for enriching uranium. Claiming enrichment is a "sovereign right," Iran refuses to accept an unlimited suspension and says it will not stop manufacturing centrifuges. The IAEA gives Iran a 25 November deadline to reveal all its nuclear activities. Tehran later announces that it has resumed large-scale conversion of uranium yellowcake ore, a step toward uranium enrichment.

July 2004 -- Iran says it has resumed production of parts for centrifuges that are used for enriching uranium, but insists that it has not resumed its enrichment activities. The announcement appears to put the enrichment-freeze deal worked out between Iran, the EU-3, and the IAEA in jeopardy.

June 2004 -- IAEA says that inspectors found new traces of enriched uranium that exceeded the levels necessary for civilian energy production.

May 2004 -- Iran submits to the IAEA a 1,000-page report on its nuclear activities.

February 2004 -- Abdul Qadeer Khan, the founder of Pakistan's nuclear program, says that he had provided atomic secrets to Iran, Libya, and North Korea since the late 1980s. IAEA inspectors notice similarities in designs and components for the advanced P-2 centrifuge, adding to suspicions that Khan supplied both North Korea and Iran with same nuclear know-how.

November 2003 -- An IAEA report states that at the moment there is no conclusive proof that Iran is developing nuclear weapons. The United States, seeking to have the matter sent to the UN Security Council, dismisses the conclusion. The IAEA's 35-member board of governors passes a resolution sternly rebuking Iran for covering up 18 years of atomic experiments, but does not send the matter to the Security Council.

October 2003 -- The foreign ministers of France, Germany, and Great Britain travel to Tehran and persuade Iran to agree to stop enriching uranium and to sign the Additional Protocol to the NPT. The EU-3 also dangle economic concessions if Tehran cooperates fully with the IAEA. Iran turns over a declaration to the IAEA admitting to 18 years of covert atomic experiments, including the unreported uranium enrichment, although it continues to deny this was for a weapons program.

September 2003 -- The United States says Iran is in noncompliance with the NPT and calls for a referral to the UN Security Council, which could impose sanctions. But Washington agrees to support a proposal from Great Britain, France, and Germany (who were negotiating on behalf of the European Union and became known as the "EU-3") to give the Tehran until the end of October to fully disclose nuclear activities and allow for a stricter inspection regime.

July 2003 -- IAEA begins a fresh round of inspections in Iran.

June 2003 -- In a report, el-Baradei says inspections have demonstrated that "Iran failed to report certain nuclear materials and activities" and urges Tehran to cooperate with the agency. The report does not declare Iran in breach of the Nuclear Nonproliferation Treaty (NPT). The IAEA requests that Iran sign the Additional Protocol to the NPT and allow unannounced inspections of its nuclear sites.

February 2003 -- International Atomic Energy Agency (IAEA) Director-General Muhammad el-Baradei visits Iran to verify Tehran's claims that its nuclear program is peaceful. IAEA inspectors later find traces of highly enriched uranium at Natanz and other sites.

August 2002 -- An Iranian exile opposition group, the National Council of Resistance of Iran, accuses Tehran of hiding a uranium-enrichment facility at Natanz and a heavy-water plant at Arak.

(compiled by RFE/RL)

Iran’s judiciary said it has executed Mohsen Langarneshin for allegedly spying for Israel and being involved in the high-profile assassination of an Islamic Revolutionary Guards Corps (IRGC) colonel in 2022.

In a statement on April 30, the judiciary described Langarneshin as a “high-ranking spy” for Israel who had “supported several Mossad operations in Iran.”

In addition to his alleged involvement in the killing of IRGC Colonel Hassan Sayyad Khodaei in May 2022, Langarneshin was also accused of playing a role in a January 2023 drone attack on a military factory in Isfahan.

Iran’s judiciary also claimed that Langaranshin had met twice with senior Mossad intelligence officers -- once in Georgia and once in Nepal -- and described him as a “highly trained operative” who had undergone “extensive espionage training and was fully capable of carrying out assigned missions.”

Foreign-based Iranian human rights-focused news outlet HRANA said on April 28 that Langarneshin had made three separate requests for a retrial, all of which were rejected.

The HRANA report said he was moved to solitary confinement in the Ghezel Hesar Prison on April 29, a day before his execution, and allowed a final visit with his parents.

His father, Masud Langaranshin, released a video stating that his son had been sentenced to death “without a fair trial” and that the case was riddled with “inconsistencies and legal flaws.”

Quoting a source close to Langaranshin, HRANA claimed that “he was pressured during detention to make forced confessions” implicating him in the assassination of Sayyad Khodaei.

A shadowy figure in the IRGC, Sayyad Khodaei was killed by gunmen outside his home in Tehran. Israeli media have described Sayyad Khodaei as a key figure behind “plots to kill Israelis and Jews” and to attack Jewish interests around the world.

In an annual report on human rights, Amnesty International said on April 29 that Iran "arbitrarily" executed hundreds of people last year as authorities "used the death penalty as a tool of political repression against protesters, dissidents and ethnic minorities."

The death toll from a massive explosion at Iran’s key Shahid Rajaei port has hit 70, local authorities said, as the interior minister blamed “negligence” for the incident, which injured more than 1,000 people.

Eskandar Momeni told Iranian state television late on April 28 that “noncompliance with safety precautions and negligence” had caused the incident, though it was not immediately clear what started the fire at the hazardous and chemical materials storage depot.

Momeni said several “culprits have been identified and summoned” but did not share further details.

Mehrdad Hassanzadeh, the director of the crisis management office in the southern Hormozgan Province where the port is located, told state television that most of the injured had already been released from hospital.

On April 27, a day after the explosion happened, Hossein Zafari, a spokesman for Iran's crisis management organization, appeared to blame the blast on poor storage of chemicals in containers at the port.

Open-source data suggests that Iran took shipments of chemical ingredients from China used in missile fuel at the port in February and March. However, an Iranian Defense Ministry spokesman has denied that any cargo used for military use, including missile fuel, was being stored at the blast site.

The New York Times quoted an unnamed source with ties to Iran's Islamic Revolutionary Guards Corps as saying the substance that exploded was sodium perchlorate, a key component in solid missile fuel.

Amid mounting criticism of officials over the incident, renowned Iranian filmmaker Jafar Panahi called for a “free and transparent referendum under international supervision to restore sovereignty to the people.”

In a post on Instagram, Panahi described the explosion as a symbol of “the collapse of a regime that has led Iran into ruin for nearly half a century.”

Iran's top diplomat has accused Israeli Prime Minister Benjamin Netanyahu of trying to dictate US policy toward Iran after the premier renewed his call for the full dismantlement of Tehran's nuclear program.

Iranian and US negotiators concluded a third round of indirect talks over Iran's nuclear program on April 26, with a fourth round scheduled for May 3, likely in a European country.

Speaking in Jerusalem a day after the talks, Netanyahu said any deal with Iran must aim for the complete dismantling of the nuclear program and also address Tehran's missile capabilities.

"The real deal that works is the deal which removes Iran's capacity to enrich uranium for nuclear weapons," Netanyahu said, adding that a good agreement should also "bring in the prevention of ballistic missiles."

Writing on X, Iranian Foreign Minister Abbas Araqchi said it was "striking…how brazenly Netanyahu is now dictating what President Trump can and cannot do in his diplomacy with Iran."

The Iranian diplomat maintained that his country was "strong and confident enough" to "thwart any attempt by malicious external actors to sabotage its foreign policy or dictate its course."

"We can only hope our US counterparts are equally steadfast," he added.

Netanyahu's comment came after a deadly explosion hit Iran’s Shahid Rajaei port, killing at least 46 people and injuring more than 1,000.

Some speculate that the explosion was linked to a shipment of a chemical ingredient used to make ballistic missile fuel, though Iran denies any sort of fuel was being stored in the container terminal.

Farzin Nadimi, a senior fellow at the Washington Institute, told RFE/RL's Radio Farda that the sharp orange color of the initial fire was consistent with burning sodium perchlorate, a component used in rocket fuel. Open-source data suggests Iran took shipments of the chemical at the port earlier this year.

According to various reports, the Donald Trump administration previously held Netanyahu back from launching strikes on Tehran's nuclear facilities. However, the US president has said he himself would be "leading the pack" toward war with Iran if he cannot clinch a deal.

Ali Shamkhani, a senior aide to Iran's supreme leader and former national security adviser, warned on April 28 that Israel would face "unimaginable consequences" if it attacked Iran's nuclear sites.

"The question is: Are these threats the result of Israel acting on its own, or are they coordinated with Trump to push forward negotiations with Iran?" he wrote on X.

A massive explosion purportedly linked to a shipment of a chemical ingredient used to make missile propellant has killed at least 40 people and injured more than 1,000 others in the southern Iranian port city of Bandar Abbas.

Authorities in Iran offered no clear explanation for what caused the April 26 blast at the Shahid Rajaei port, although independent experts said it appeared to be due to the improper storage of sodium perchlorate, a component used in rocket fuel.

On April 27, state media reported that the blast was now under control.

Iranian President Masud Pezeshkian visited with those some of the injured and told local officials that “we have to find out why it happened,” according to the government website.

The head of the Iranian Red Crescent Society, Pir Hossein Kolivand, said 190 of those injured remained hospitalized as of April 27.

Supreme Leader Ali Khamenei ordered security and judicial officials to investigate "any negligence or deliberateness" in the incident.

The Shahid Rajaei port is Iran's busiest, processing up to 80 percent of the country's shipping traffic.

Hossein Zafari, a spokesman for Iran's crisis management organization, appeared to blame the explosion on poor storage of chemicals in containers at the port.

"The cause of the explosion was the chemicals inside the containers," he told Iran's ILNA news agency.

"Previously, the director general of crisis management had given warnings to this port during their visits and had pointed out the possibility of danger," Zafari said.

According to the private security firm Ambrey, the port had received a shipment of “sodium perchlorate rocket fuel” in March, which was going to be used to replenish Iran’s missile stocks after being depleted by its direct attacks on Israel during the war with Hamas -- which is designated as a terrorist group by the United States and the European Union -- in the Gaza Strip.

Tehran has not acknowledged taking the shipment, but ship-tracking data obtained by the Associated Press shows vessels believed to be carrying the chemical in the vicinity of the port in March.

Iran Launches Investigation After Port Explosion

Iran's Interior Ministry said it launched an investigation into the port explosion.

The April 26 blast happened as Iran and the United States met in Oman for the third round of talks over Tehran’s rapidly advancing nuclear program. A fourth round is scheduled for May 3, also in Oman.

While no Iranian officials have suggested the explosion was due to an attack, Iranian Foreign Minister Abbas Araqchi, who is leading Tehran's delegation in Oman, said earlier this week that "our security services are on high alert given past instances of attempted sabotage and assassination operations designed to provoke a legitimate response."

Deadly incidents have hit Iranian energy and industrial infrastructure in recent years -- such as gas explosions and oil refinery fires -- with many blamed on negligence.

Tehran, however, has also blamed some incidents on its arch-foe Israel, which has carried out attacks on Iranian soil targeting the country's nuclear program. Last year, Israel also bombed Iran's air defenses.

Iran accused Israel as being behind a February 2024 attack on Iranian gas pipelines, as well as a major cyberattack on the Shahid Rajaei port in May 2020, causing transport chaos for days after crashing the facility's computer system.

Israeli Prime Minister Benjamin Netanyahu on April 27 repeated his calls for "all of" Iran's nuclear infrastructure to be dismantled.

"We are in close contact with the United States. But I said, one way or the other, Iran will not have nuclear weapons," Netanyahu told a news conference.

The Shahid Rajaei port is Iran's largest and it mainly handles large volumes of container traffic and also has oil tanks and other petrochemical facilities.

The port is some 1,050 kilometers southeast of the capital Tehran, on the Strait of Hormuz, the narrow mouth of the Persian Gulf where 20 percent of all oil traded globally passes through.

Local officials said that all schools, universities, and offices in Bandar Abbas will be closed on April 27.

With reporting from Reuters and the AP.

Iran and the United States met in Oman on April 26 for the third round of talks over Tehran’s rapidly advancing nuclear program. A fourth round is scheduled for May 3, with the location yet to be announced.

The talks ran for several hours in Muscat, Omani mediators said of the indirect sessions between Iranian Foreign Minister Abbas Araqchi and Steve Witkoff, the US special envoy to the Middle East.

"The negotiations were conducted very seriously and professionally," Araqchi said without providing full details. "We are cautiously optimistic."

Omani Foreign Minister Badr al-Busaidi, who has mediated the two previous round of US-Iran talks in Muscat and Rome, offered a positive note at the end of the negotiations.

Iran and the United States “identified a shared aspiration to reach agreement based on mutual respect and enduring commitments,” Busaidi posted on X after the conclusion of talks in Oman.

“Core principles, objectives and technical concerns were all addressed. Talks will continue next week with a further high-level meeting provisionally scheduled for May 3.”

The talks seek to limit Iran's nuclear program in exchange for the lifting of some of the crushing economic sanctions the United States has imposed on the country.

US President Donald Trump has repeatedly threatened to unleash airstrikes targeting Iran’s program if a deal isn’t reached.

Iranian officials increasingly warn that they could pursue a nuclear weapon with their stockpile of uranium enriched to near weapons-grade levels.

Welcome back to The Farda Briefing, an RFE/RL newsletter that tracks the key issues in Iran and explains why they matter.

I'm RFE/RL correspondent Kian Sharifi. In this edition, I'm looking at how Iran is seeking to reassure China that, even with a nuclear deal in place with the United States, Beijing will remain a key partner for Tehran.

What You Need To Know

• China Ties A Priority Even Amid Nuclear Progress: Iranian Foreign Minister Abbas Araqchi traveled to China this week, days ahead of a third round of nuclear talks with the United States in Oman. This trip underscored Tehran's commitment to deepening ties with Beijing, signaling that even if a deal is reached with Washington, relations with China will not be compromised.

• New Tunnels Grab IAEA's Attention: The Institute for Science and International Security on April 23 revealed, using satellite imagery, that Iran has set up a new security perimeter around a "new, large, deeply buried tunnel complex" near the Natanz nuclear site. The tunnels are located beneath Mount Kolang Gaz La, south of Natanz. Rafael Grossi, director general of the International Atomic Energy Agency (IAEA), stated that he has repeatedly raised concerns over the tunnels with Iran, but Tehran claims it was not under any obligation to inform the agency. Grossi said it "cannot be excluded" that the tunnels could store undeclared nuclear material.

• Looking To Reconnect With European Powers: Araqchi wrote on X that relations with the E3 are at a low point and urged renewed diplomacy, offering visits to Paris, Berlin, and London. His comments on April 24 come as the E3 (Britain, France, Germany) have been sidelined from current Iran-US nuclear talks, with mediation now led by Oman. The E3 have threatened to trigger the reimposition of UN sanctions on Iran by the end of June if no agreement is reached on Tehran's nuclear program.

The Big Issue

Iran's China Play Won't Change

Araqchi's April 23 visit to Beijing underscored Tehran's commitment to its strategic partnership with China, regardless of progress in nuclear talks with the United States.

Araqchi carried a message from Iranian Supreme Leader Ayatollah Ali Khamenei to President Xi Jinping, reaffirming that the Iran-China relationship is a long-term priority and will not be affected by developments with Washington. Notably, Araqchi traveled to Russia a week ago, ahead of the second round of talks with the United States, and handed over a message from Khamenei to Russian leader Vladimir Putin.

Both Tehran and Beijing pledged to deepen economic and political ties, fast-track a 25-year cooperation pact, and coordinate closely on regional and global challenges.

Why It Matters: China is Iran's largest trading partner and a crucial diplomatic ally, especially as Tehran faces Western sanctions.

For Iran, China offers investment, technology, and a reliable market for its energy exports, while providing political backing in international forums.

For China, Iran is a vital link in its Belt and Road Initiative and a key player in Middle Eastern energy security.

Damon Golriz, a lecturer at The Hague University of Applied Sciences, said Iran is enhancing its relations with Russia and China because it believes the United States's status as a superpower is on the decline.

He told RFE/RL's Radio Farda that Tehran wants to reassure Moscow and Beijing that "agreements with America will not harm Russia and China's interests in Iran."

The message is that "not only will they keep their special place in Iran, but Tehran will also help Russia and China to accelerate America's decline," Golriz added.

China and Russia have both reaped advantages from Iran's tensions with the United States, with Beijing snapping up discounted Iranian oil and Moscow deploying Iranian drones in Ukraine. But if those tensions escalate further, the fallout could be something both powers would rather avoid.

China relies heavily on energy imports, with 16 percent of its oil in March coming from Iran. But its interest in Iran extends beyond oil. If sanctions are lifted, Iran's need for investment in railways and ports, among others, could benefit Chinese companies.

Crucially, over 40 percent of China's energy comes through the Persian Gulf. For Beijing, any military escalation in the region isn't just a geopolitical concern -- it's a direct threat to its energy security and economic stability.

What's Being Said: At the end of his trip, Araqchi wrote on X in Chinese that no matter how the global landscape shifts, "Iran will always see China as a trustworthy and reliable partner."

Taking a dig at the West, Iran's ambassador to China, Mohsen Bakhtiar, said Tehran and Beijing "both stand for international law and multilateralism and see strong-arm tactics as a threat to friendly ties between nations and South-South cooperation."

Expert Opinion: Golriz said the Islamic republic sees its survival as tied to strong relations with Russia and China, which is why Araqchi is tasked not only with securing a deal with Washington to lift sanctions but also with maintaining those strategic ties.

"But I believe this is a very difficult balancing act -- trying to satisfy Russian and Chinese interests on one side, and American demands on the other. Still, if that balance is achieved -- especially by moving closer to the West -- it would ultimately serve the national interest more than the interests of the Islamic republic."

That's all from me for now.

Until next time,

Kian Sharifi

If you enjoyed this briefing and don't want to miss the next edition, subscribe here . It will be sent to your inbox every Friday.

High-stakes nuclear talks between the United States and Iran have already entered the technical phase after just two rounds of negotiations mediated by Oman.

A third round of talks, along with separate technical discussions, is scheduled for April 26 in Muscat.

The progress has fueled speculation, particularly in Iran, that the administration of US President Donald Trump has dropped its demand for the dismantlement of Tehran's nuclear program in favor of simply capping it.

But analysts caution that it's far too early to draw such conclusions.

While the shift to technical discussions might suggest a softening of US demands, analysts say dismantlement could still be the underlying objective -- or at least a point of leverage.

"I never thought that dismantlement was a credible goal," said Richard Nephew, who served as the lead sanctions expert on the US team that clinched the 2015 nuclear deal with Iran.

"But if this is still in the Trump administration's heads, then the long-term perspective is still bleak."

He noted that technical negotiations also took place during the talks that eventually led to the Joint Comprehensive Plan of Action (JCPOA), even when US demands remained maximalist.

Jason Brodsky, policy director at United Against Nuclear Iran (UANI), sees the current trajectory not as a concession but as strategic pressure.

"A Trump doctrine on Iran takes shape where it gives Iran a choice: Either you dismantle your nuclear program or the US and/or Israel will dismantle it for you," he said.

Is Iran Running Down The Clock?

Some, particularly proponents of dismantlement, argue that the Islamic republic is dragging out the negotiations to run down the clock on the return of UN sanctions.

Britain, France, and Germany have threatened to trigger the "snapback" mechanism of the JCPOA -- re-imposing UN sanctions against Tehran -- if it fails to reach a deal with the United States by the end of June. However, that mechanism expires in October.

Both analysts agree Iran sees value in prolonging the process to stall pressure, avoid snapback sanctions, or simply buy time.

"There is only a certain amount of pressure that comes to beat that clock, because even after snapback expires, you still have a hostile United States with its national sanctions campaign," Nephew said.

"Iran wants to clinch a decent deal, but they'll take wasted time -- and delayed military action -- as a consolation prize," he added.

Brodsky offered a sharper view, calling the negotiations "a shield" that Tehran uses to protect its nuclear work from further scrutiny or action.

"Iran only loses should the negotiations collapse," he said. "The United States, however, does not need the talks as much as Iran does."

What Would A Good Iran Deal Look Like?

Despite skepticism over whether dismantlement is still a realistic demand, analysts agree a deal that limits Iran's nuclear activities can still be credible, if it includes key safeguards.

"The JCPOA gives us a lot of advice here," said Nephew. "You'd need three things: verification of the cap, physical limitations so that they can't quickly exceed it, and a credible risk of consequences if they cheat."

He noted that while Iran is unlikely to scrap its advanced centrifuges again, as it did under the 2015 deal, "there is still space that a deal could be found."

Brodsky, however, is doubtful that any deal short of full dismantlement can truly prevent Iran from using its nuclear program as leverage.

He views even low-level enrichment -- such as the 3.67 percent limit under the JCPOA -- as a threat.

"Its right to enrich uranium to 3.67 percent under the JCPOA was part of [an] extortion racket," he said, referring to Iran teasing nuclear weapons acquisition.

"The continuation of this negotiation process leads some observers to believe the United States has conceded a right to enrich uranium to Iran," Brodsky said. "I believe the Trump administration is still defining the contours of what an acceptable deal would look like."

Iran’s Foreign Minister Abbas Araqchi issued a public call for renewed diplomacy with the E3 -- France, Germany, and the UK -- amid mounting tensions and their exclusion from ongoing nuclear negotiations between Iran and the United States.

In a post on X on April 24, Araqchi acknowledged that relations with the E3 are “currently down,” describing the status quo as “lose-lose” for both sides.

He emphasized that “placing blame is a futile exercise” and instead urged a return to dialogue and cooperation, not only on nuclear issues but across all areas of mutual interest.

Araqchi offered to visit Paris, Berlin, and London for direct talks.

“The ball is now in the E3's court,” the Iranian foreign minister wrote, “how we act at this critical junction is likely to define the foreseeable future.”

The foreign minister’s outreach comes as the E3 have been sidelined from the latest round of nuclear negotiations, which are being mediated by Oman rather than European powers.

The E3 were key players in earlier efforts to revive the 2015 nuclear deal, but this time they've been sidelined.

The E3 have threatened to trigger the re-imposition of UN sanctions on Iran if no agreement is reached with the United States by the end of June. The “snapback” of UN sanctions is a provision under the effectively defunct 2015 nuclear deal, which formally expires in October.

Iranian state media have welcomed the E3’s exclusion, with The Tehran Times even accusing them -- without evidence -- of backing UN nuclear chief Rafael Grossi for secretary-general in exchange for helping to “demonize” Iran and justify a return to UN sanctions.

Iranian and US negotiators agreed to hold a third round of high-stakes talks on Iran's nuclear ambitions, a positive signal amid mixed White House messages about potential military action and new demands on Tehran.

The April 19 meetings, held in Rome, were the second time that top-level negotiators from Washington and Tehran had met this month.

There was no immediate comment on the outcome of the Rome talks from the US delegation, which was headed by White House special envoy Steve Witkoff.

But news agencies quoted senior US officials as saying the sides “made very good progress” in the Rome discussions.

"Today, in Rome over four hours in our second round of talks, we made very good progress in our direct and indirect discussions," said an unidentified US official -- who also confirmed a statement by Iran that the two sides agreed to meet again next week.

AP also quoted a US official as confirming that Witkoff and Iranian Foreign Minister Araqchi had spoken face to face.

Iran's foreign minister said the two sides had agreed to meet again on April 26 in Oman, where the first round took place.

"I believe technical negotiations at the expert level will begin in Oman on Wednesday [April 23)] and next Saturday we will meet in Oman and review the results of the experts' work to see how close it is to the principles of an agreement," Araqchi told Iranian state TV.

"It was a good meeting, and I can say that the negotiations are moving forward. This time we managed to reach a better understanding on a series of principles and goals," he said.

The United States and other Western countries have long accused Iran of trying to build nuclear weapons.

Tehran has consistently denied the allegations, insisting that its efforts are aimed at civilian purposes, such as electricity generation.

Conflicting Messages

Following his return to the White House in January, US President Donald Trump, who had previously withdrawn from a 2015 accord known as the Joint Comprehensive Plan of Action (JCPOA), revived a "maximum pressure" campaign of sanctions against Iran.

Last month, he sent a letter to Iran's supreme leader urging renewed talks while warning of military action if diplomacy failed.

In the past week, Trump and other White House officials have sent sometimes conflicting messages about the US approach to the talks. The White House has ordered heavy, long-range bombers to the region, along with a second aircraft carrier.

"I'm not in a rush" to use the military option, Trump told reporters on April 17. "I think Iran wants to talk."

On April 18, he told reporters: "I'm for stopping Iran, very simply, from having a nuclear weapon. They can't have a nuclear weapon. I want Iran to be great and prosperous and terrific."

In an interview days earlier on Fox News, Witkoff said that the United States was open to Iran having some sort of limited nuclear program.

But he then walked back that position in a social media post, suggesting that the entire program needed to be dismantled.

US Secretary of State Marco Rubio, meanwhile, said he hoped the Iranian talks would be “fruitful.”

“We would all prefer a peaceful resolution and a lasting one,” he said after meetings in Paris.

But, he added, “It has to be something that not just prevents Iran from having a nuclear weapon now, but in the future as well.”

Israel's Role

Israel’s role in the debate over Iran’s nuclear ambitions is also critical. Israeli officials have vowed to prevent Tehran from acquiring a nuclear weapon, and Israel has not ruled out an attack on its nuclear facilities in the coming months, according to multiple news reports.

Trump has reportedly told Israeli Prime Minister Benjamin Netanyahu that Washington did not support such a move.

Former officials and experts have long said that Israel would need significant US military support –- and weapons –- to destroy Iran’s nuclear facilities and stockpiles, some of which are in underground facilities.

With reporting by RFE/RL's Radio Farda, AP, AFP, and Reuters

Iranian and US negotiators will hold a second round of indirect talks on April 19, a week after concluding discussions that both sides described as “constructive” and “positive.”

While the first round was hosted in Oman, the second will take place in Rome. Omani diplomats will continue to mediate the talks.

Here’s where things stand ahead of the next round of negotiations over Iran’s nuclear program -- with the possibility of military action still looming.

Witkoff's Reversal On Enrichment Limits

US Special Envoy to the Middle East Steve Witkoff, who is leading the US negotiating team, caused a stir when he publicly reversed his position on Iran’s nuclear program.

On April 15, he said Iran would need to limit its uranium enrichment to 3.67 percent -- the cap set by a 2015 nuclear deal that US President Donald Trump withdrew from in 2018.

But within hours, Witkoff walked back the comment after a backlash from hard-liners who favor dismantling Iran’s program. In a statement on social media, he said Iran “must stop and eliminate its nuclear enrichment and weaponization program.”

The about-face appeared to confuse Iranian officials. Foreign Minister Abbas Araqchi, Iran's chief negotiator, responded that Washington’s “true position must be clarified at the negotiating table.”

Iran has consistently maintained that its nuclear program is peaceful and has ruled out dismantling it.

Jalil Roshandel, director of the Security Studies Program at East Carolina University, told RFE/RL’s Radio Farda that the Trump administration is unlikely to maintain its hard-line stance.

“Trump can get a win by accepting the 3.67 percent limit in exchange for other concessions, such as extending the UN sanctions sunset clause set to expire in October,” Roshandel said.

Expanding The Scope Of A Deal

Another sticking point is whether a potential deal will focus solely on Iran’s nuclear activities or also address its missile program.

In an April 15 interview with Fox News, Witkoff said the Rome talks would also cover “verification on weaponization,” including missiles.

But Iran has long refused to negotiate over its missile arsenal, which it considers a vital part of its defense strategy.

The Islamic republic used drones and missiles in two attacks on Israel last year -- the second of which was described as the largest single ballistic missile attack in history.

Mark Fitzpatrick, a former US diplomat and a nonproliferation expert, said expanding the scope of talks could complicate progress.

“It's not surprising that the Trump team would want to put missiles back on the table,” Fitzpatrick told Radio Farda. “But it would make negotiations much more difficult because of Iran's steadfast position that missiles are essential to its defense and deterrence posture.”

European Powers Sidelined

Britain, Germany, and France -- collectively known as the E3 -- are also signatories to the 2015 nuclear deal and played a key role in previous attempts to revive it.

This time, however, they appear to have been completely sidelined. Even though the next round of talks will be held in Italy, it will be Oman -- not the Europeans -- handling mediation.

State-affiliated media in Iran have welcomed the E3’s exclusion. The Tehran Times, an English-language newspaper, claimed -- without evidence -- that the three nations are so frustrated by “their exclusion” that they offered Rafael Grossi, head of the UN nuclear watchdog, their backing to become the next UN chief if he helps “demonize” Iran.

The paper argued that this move is aimed at justifying the return of UN sanctions -- something the E3 have threatened by the end of June if Tehran fails to reach a deal with the United States.

US Military Pressure In The Region

Trump has repeatedly warned that he would resort to military action against Iran’s nuclear program if a deal isn’t reached.

Amid rising tensions -- and a US bombing campaign targeting Tehran’s allies in Yemen -- Washington is bolstering its military presence in the Middle East.

Last month, the United States dispatched at least six B-2 bombers to a joint US-British military base on Diego Garcia, a small island in the Indian Ocean. This week, the USS Carl Vinson aircraft carrier was sent to reinforce the USS Harry S. Truman already stationed in the region.

Analysts believe Iran takes Trump’s threats seriously, but it remains unclear whether Tehran is willing to risk air strikes on its key nuclear sites.

Trump has said Israel would play a leading role in any such attack.

According to The New York Times, Israel had been preparing to launch air strikes against Iran -- with US assistance -- as early as May, but was held back by Trump in favor of pursuing diplomacy.

With reporting by Reza Jamali and Hannah Kaviani of RFE/RL’s Radio Farda

Iran’s foreign minister has called for Russia to play a role in high-stakes negotiations over the fate of Tehran’s nuclear programs, as he cast doubt on US intentions ahead a new round of talks.

Speaking on April 18 alongside Russian Foreign Minister Sergei Lavrov, Abbas Araqchi said he still believed an agreement was possible.

The Iranian diplomat was set to meet with White House special envoy Steve Witkoff in Rome on April 19, for a second round of talks over Iran’s atomic programs.

"Although we have serious doubts about the intentions and motivations of the American side, in any case we will participate in tomorrow's negotiations," Araqchi said during a joint appearance in Moscow.

Last week’s first round of talks in Oman was the highest-level negotiations between Tehran and Washington since US President Donald Trump abandoned a landmark nuclear deal in 2018.

Western countries, including the United States, have long accused Iran of trying to build nuclear weapons. Tehran has consistently denied the allegations, insisting that its efforts are aimed at civilian purposes, like electricity generation.

Earlier in the week, Witkoff called for an end to all of Iran’s uranium enrichment programs. International inspectors say Tehran has managed to refine its uranium stocks to 60 percent -- which is close to the threshold at which uranium is considered weapons-grade.

Araqchi responded on April 16, saying that Iran's enrichment efforts were not up for discussion.

"If there is similar willingness on the other side, and they refrain from making unreasonable and unrealistic demands, I believe reaching an agreement is likely," Araghchi said.

Since taking office in January, Trump has ratcheted up the pressure on Iran, including by sending more US Air Force and naval assets to the region. But he’s also forced direct talks with Iranian officials.

“I’m not asking for much,” Trump said in comments earlier this month, “but they can’t have a nuclear weapon.”

With reporting by Reuters

The US military said it destroyed a key Yemeni fuel port held by Houthi rebels, who said the air strikes also killed 20 people and wounded 50 others.

The US military’s Central Command said its forces took action on the port of Ras Isa to eliminate a source of fuel for the Iran-backed Houthi rebels and deprive them of revenue.

“The objective of these strikes was to degrade the economic source of power of the Houthis, who continue to exploit and bring great pain upon their fellow countrymen,” Centcom said in a statement.

“This strike was not intended to harm the people of Yemen, who rightly want to throw off the yoke of Houthi subjugation and live peacefully,” Centcom said.

The US air strikes have hammered the Houthis in a campaign launched by President Donald Trump on March 15 to end their attacks on civilian shipping and military vessels in the Red Sea and the Gulf of Aden.

Houthi attacks have hampered shipping through the Suez Canal -- a vital route for world seaborne traffic -- forcing many companies to send their ships around the tip of southern Africa.

The Houthis denounced the attack.

“This completely unjustified aggression represents a flagrant violation of Yemen’s sovereignty and independence and a direct targeting of the entire Yemeni people,” the Houthis said in a statement carried by the Houthi-controlled SABA news agency. “It targets a vital civilian facility that has served the Yemeni people for decades.”

Health Ministry spokesman Anees Alasbahi said the preliminary death toll stood at 20, including five paramedics.

There were also "50 wounded workers and employees at the Ras Issa oil port, following the American aggression," he said on X.

"The death toll is likely to rise as body parts are still being identified," he added.

The number of dead represented one of the highest reported death tolls since Trump vowed that military action against the rebels would continue until they are no longer a threat to shipping.

The Ras Isa port lies along the west coast of Yemen on the Red Sea.

Centcom said ships have continued to supply fuel via the port despite Washington designating the rebels a foreign terrorist organization earlier this year. The Centcom statement did not specify the source of the fuel.

US State Department spokeswoman Tammy Bruce commented earlier on April 17 about China's participation in Yemen. Bruce told journalists that the Chinese satellite firm Chang Guang Satellite Technology Company was "directly supporting” the Houthis.

Bruce said their actions and Beijing's support of the company, “is yet another example of China's empty claims to support peace.”

With reporting by AP and Reuters

Tehran is ready to ease US concerns over its nuclear activities but scrapping uranium enrichment is off the table, Foreign Minister Abbas Araqchi said as the two sides prepare for a second round of talks this weekend over Iran's nuclear program.

Araqchi told reporters after a weekly cabinet meeting in Tehran on April 16 that Iran's enrichment is a "real, accepted matter."

"We're ready to build confidence in response to possible concerns, but the principle of enrichment is nonnegotiable," he said, days ahead of the second round of talks with the United States on April 19, which Iran's state broadcaster announced would take place in the Italian capital, Rome, and not in Oman as previously thought.

Araqchi's comments came in response to a statement by US Special Envoy Steve Witkoff on April 15 saying Iran "must stop and eliminate its nuclear enrichment and weaponization program."

But hours earlier, Witkoff had told Fox News that the Donald Trump administration was seeking to cap Iran's uranium enrichment at 3.67 percent -- the limit set in the 2015 nuclear deal that Trump abrogated in 2018.

"Iran must not possess nuclear weapons, and it should not enrich uranium beyond 3.67 percent," Witkoff said.

His apparent reversal came after a conservative backlash on social media, with the administration being accused of repackaging the 2015 deal, which is formally known as the Joint Comprehensive Plan of Action (JCPOA).

"We applaud Special Envoy Witkoff's statement," wrote Mark Wallace, chief executive of United Against Nuclear Iran (UANI), a US-based nonprofit, after Witkoff changed his tone.

"It is clear under the Trump Doctrine that Iran must verifiably dismantle its nuclear program or the US and Israel will do so," said Wallace, a former US diplomat.

Araqchi, who will travel to Moscow on April 17, noted Witkoff had made "different comments" since the conclusion of the first round of talks but added Washington's "true position must be clarified at the negotiating table."

Trump has made it clear Iran cannot be allowed to acquire nuclear weapons, but he has not explicitly commented on whether that involves curbing Iran's nuclear program or fully dismantling it. In the meantime, his administration has been sending out mixed messages.

Quoting an unnamed US official, the Axios news website on April 16 attributed the lack of clarity to ongoing internal discussions.

"The Iran policy is not very clear mainly because it is still being figured out. It is tricky because it's a highly politically charged issue," the official said, according to Axios.

Former US diplomat and nonproliferation expert Mark Fitzpatrick said a deal would be unlikely unless the Trump administration relaxed its position.

"Trump would have to change the position of no enrichment to a position of low enrichment," he told RFE/RL's Radio Farda.

"Iran is not going to go to a 'no enrichment' and it's certainly not going to accept it, but it would be willing to negotiate the levels of enrichment. And yes, this would be like the negotiations under the JCPOA," he added.

With reporting by Hannah Kaviani of RFE/RL's Radio Farda

Iranian Supreme Leader Ayatollah Ali Khamenei appeared to back the continuation of nuclear discussions between Tehran and Washington, though he said he is neither "overly optimistic nor overly pessimistic" about the talks as they head toward a second round this weekend.

In his first public comments on the initiation of talks between Iran and the United States last weekend, Khamenei on April 15 said Iranian negotiators need to proceed with caution.

"A decision was made [to enter the talks] and has been carried out well in the initial steps. Going forward, we need to move carefully. Our red lines -- and the other side's -- are clearly defined," Khamenei said at a gathering of the senior members of the three branches of power.

"The negotiations may or may not lead to a result. We are neither very optimistic nor very pessimistic about these talks. Of course, we are very pessimistic about the other side, but we are optimistic about our own capabilities," he added.

Khamenei, who has the final say on all state matters, urged officials "not to tie the country's affairs" to the negotiations.

The first round of talks, which were mostly carried out indirectly, were held in Muscat on April 12, with the next round scheduled for April 19.

Italy was initially set to host the second round, but Iran later said Oman would continue to host the talks. None of the parties involved have elaborated on why the venue was changed.