TEHRAN, April 1 -- Iran's Foreign Minister Abbas Araghchi said there were no negotiations with the United States and that Tehran had not responded to a reported 15-point proposal from Washington to end the war.

"We receive messages from the American side, some direct and some through our friends in the region, and whenever necessary we respond to these messages," Araghchi said in an interview with Al Jazeera aired on Wednesday and dubbed into Arabic from Persian.

"There are no grounds for negotiations," he said, adding however that some messages had been exchanged directly with US special envoy Steve Witkoff.

Iran has been at war with the United States and Israel since February 28, when strikes killed the country's supreme leader and t...