More than three months after the US and Israel launched strikes against Iran, the conflict has hardened into a stalemate while largely indirect talks to negotiate an interim deal have proved inconclusive, leaving the Strait of Hormuz largely shut.

Iran has not yet responded to a proposed final text of the temporary deal, and was taking ​a "stern" approach given what it sees as a history of U.S. non-compliance and longstanding mistrust, Mehr cited a source as saying.

Trump said ​on Monday that negotiations with Iran were continuing and there would be a deal to extend the ceasefire and reopen ⁠the Strait of Hormuz over the next week.

Iran's Revolutionary Guards said on Tuesday that 24 ​vessels had transited the strait in the past 24 hours after obtaining permission from the Guards' navy.