US President Donald Trump said a meeting on Iran would be held Tuesday in Doha, without giving further details, though Iranian officials said no such meeting was scheduled.
"Iran has requested a meeting. It will take place tomorrow in Doha," Trump wrote in all capital letters in a social media post on Monday.
The US president has tried to preserve an increasingly fragile interim deal as hostilities have mounted in the Strait of Hormuz in recent days, which could cause oil prices to rise and undermine Trump's claims to voters that inflation in America was easing.
Trump said the meeting with Iran would happen on Tuesday in Doha, Qatar.
Earlier on Monday, Iran's president said that USD 6 billion in frozen Iranian assets would be released by Qatar, as negotiations with the US were challenged by attacks across the Persian Gulf this weekend.
Masoud Pezeshkian's mention of the funds appeared aimed at selling the Iranian public on the interim deal, particularly as its grip on the Strait of Hormuz has been tested by efforts to open Oman's territorial waters to both inbound and outbound traffic from the Persian Gulf.
Pakistan, a key mediator, has said that talks would resume Tuesday.
The Trump administration on Sunday said nothing has been cancelled and technical talks are on track for the coming days.
But Kazem Gharibabadi, a senior negotiator for Iran, denied any talks had been scheduled, in comments published by IRNA.
"Although consultations with Qatar, including on following up on the implementation of the other side's commitments, are continuing as usual, reports by some media about technical talks by the working groups being held in Doha are not confirmed," he said.
Technical talks involve lower-level diplomats working on the specifics of any deal that would draw top leaders from Iran and the US back to the table.