Iran has questioned the seriousness of American peace efforts after naval clashes in the Gulf.
Tehran is keeping Washington waiting for a response to its latest negotiating position, which had been expected on Friday evening.
On Saturday, Abbas Araghchi, the Iranian foreign minister, called into question the reliability of the US leadership, in a phone call with his Turkish counterpart.
According to the Iranian ISNA news agency, he said: “The recent escalation of tensions by American forces in the Persian Gulf and their numerous actions in violating the ceasefire have added to suspicions about the motivation and seriousness of the American side in the path of diplomacy.”
