Muscat – The United States and Iran will hold a new round of nuclear negotiations in Geneva, Switzerland on Thursday, Oman’s foreign minister confirmed on Sunday.

“Pleased to confirm US-Iran negotiations are now set for Geneva this Thursday, with a positive push to go the extra mile towards finalising the deal,” H E Sayyid Badr Al Busaidi wrote on X.

The two sides resumed diplomacy earlier this month in Muscat, and a second round in Geneva.

Oman has played a mediating role in indirect contacts between Washington and Tehran in recent months.

Citing a senior US official, the news website Axios reported early on Sunday that Washington is ready to hold another round of negotiations with Tehran in Geneva only if Iran provides a detailed nuclear proposal within the next two days.

The official indicated that a concrete Iranian submission could pave the way for “detailed negotiations” towards a nuclear agreement, with the possibility of an interim deal also on the table before any comprehensive agreement is reached.

Another senior US official confirmed to the same media outlet the planned meeting in Geneva but added that the Trump administration is still waiting for Iran’s proposal. He believed that the Trump administration expects to receive the proposal by Tuesday.

Iranian Foreign Minister Abbas Araghchi told CBS that the proposal is still being finalised, with both sides working on elements that will “accommodate both sides’ concerns and trusts”.

He said the Iranian leadership has not yet signed off, but he is confident the sides will make progress when they meet.

Senior US officials warned that the ongoing diplomatic effort may represent the final window before Washington authorises a large-scale joint military operation with Israel, one potentially targeting Supreme Leader Ali Khamenei directly, according to Axios.

The warning comes amid a US military buildup in the Middle East, where the USS Abraham Lincoln carrier strike group and more fighter jets have already arrived, with the USS Gerald R Ford on its way.

On February 19, Trump set a ten- to 15-day window for negotiations to yield fruit before military options come into play, reiterating the threats the next day that he was also considering a more limited strike to pressure Iran into reaching a “serious” agreement.