The United States and Iran are issuing flatly contradictory accounts of whether a nuclear peace deal has been finalised, with no signed document in public view to settle the dispute.

Trump told reporters Sunday that a ceasefire agreement with Tehran had been concluded. Iran's state-run Fars News Agency reported the same day that no such deal has been signed or officially agreed by either side.

Iranian officials echoed the denial, telling state media that Tehran has not finalised any arrangement with Washington and that reports of a concluded agreement were inaccurate.

The Wail was unable to confirm the existence of a signed accord as of Sunday evening. No joint statement from both governments has been released.

The public contradiction follows months of intermittent back-channel contacts between American and Iranian delegations. Talks have been mediated in part through Omani intermediaries, according to earlier reporting reviewed by the Wail.

A senior US official did not immediately respond to a request for clarification on the record. Iran's foreign ministry had not issued a formal English-language statement as of filing.

The next round of direct or mediated talks has not been publicly scheduled. Both governments are expected to issue further statements in the coming 24 hours.