US says Iran deal still possible, as Trump tempers expectations

U.S. Secretary of State Marco Rubio said a deal to end the war with Iran could materialise on Monday, as President Donald Trump tempered expectations.

The United States and Iran have observed a ceasefire since April 8 while mediators push for a negotiated settlement, although Iran has imposed controls on Gulf shipping and the U.S. has blockaded Iran's ports.

"We thought we might have some news last night, maybe today, I wouldn't read too much into it," Rubio said in New Delhi, referring to the potential agreement.

"We have what I think is a pretty solid thing on the table in terms of their ability to open up the straits, get the straits open," he told reporters in the Indian capital, where he has been on an official visit.