USA and Iranian flags are seen in this illustration taken, Sept. 8, 2022. Photo: REUTERS/Dado Ruvic/Illustration

The fourth round of nuclear talks between the United States and Iran, which were set to take place in Rome this weekend, have been postponed, with a new date yet to be announced amid rising tensions between Washington and Tehran.

On Thursday, Iranian Foreign Ministry spokesman Esmaeil Baghaei announced that the fourth round of indirect nuclear talks with US officials, originally scheduled for May 3, had been postponed at the suggestion of the Omani Foreign Minister, who mediated previous negotiations between the two adversaries.

In a post on X, the top Omani diplomat, Badr Albusaidi, confirmed that the upcoming talks had been delayed, stating that new dates will be announced once both sides reach a mutual agreement.

“For logistical reasons, we are rescheduling the US-Iran meeting provisionally planned for Saturday, May 3rd,” Albusaidi said.

For logistical reasons we are rescheduling the US Iran meeting provisionally planned for Saturday May 3rd. New dates will be announced when mutually agreed.

— Badr Albusaidi – بدر البوسعيدي (@badralbusaidi) May 1, 2025

Earlier on Thursday, Iran accused Washington of “contradictory behavior and provocative statements” following remarks by US Secretary of Defense Pete Hegseth, who warned Tehran of severe consequences for supporting Yemen’s Houthi militia, an internationally designated terrorist group.

The Iran-backed group, which controls northern Yemen, has been targeting ships in the Red Sea since November 2023, disrupting global trade, while justifying the attacks as acts of solidarity with the Palestinians.

Iran’s accusation against Washington also comes after the US imposed new oil-related sanctions on Tehran this week, as US President Donald Trump continued pursing negotiations over the Iranian nuclear program.

As part of the Trump administration’s “maximum pressure” campaign against Iran — which aims to cut the country’s crude exports to zero and prevent it from obtaining a nuclear weapon — Washington has been targeting Tehran’s oil industry with mounting sanctions.

“US sanctions on Iran during the nuclear talks are not helping the sides to resolve the nuclear dispute through diplomacy,” a senior Iranian official told Reuters. “Depending on the US approach, the date of the next round of talks will be announced.”

Last month, the two adversaries held their first official nuclear negotiation since the US withdrew from a now-defunct 2015 nuclear deal that had imposed temporary limits on Tehran’s nuclear program in exchange for sanction relief.

The first and third rounds of talks were held in Oman, while the second round took place in Rome at the residence of the Omani ambassador.

Tehran has previously rejected halting its uranium enrichment program, insisting that the country’s right to enrich uranium is non-negotiable, despite Washington’s threats of military action, additional sanctions, and tariffs if an agreement is not reached to curb Iran’s nuclear activities.

However, US special envoy Steve Witkoff said that any deal with Iran must require the complete dismantling of its “nuclear enrichment and weaponization program.” Witkoff’s comments came after he received criticism for suggesting the Islamic Republic would be allowed to maintain its nuclear program in a limited capacity.

Despite Iran’s claims that its nuclear program is solely for civilian purposes rather than weapon development, Western states have said there is no “credible civilian justification” for the country’s recent nuclear activity, arguing it “gives Iran the capability to rapidly produce sufficient fissile material for multiple nuclear weapons.”