President Trump and other administration officials are tempering expectations raised of an imminent agreement to end the war in Iran while Iranian officials have signaled there are still disagreements on key issues.

U.S. Secretary of State Marco Rubio on Thursday said there were "good signs" that an agreement to end the Middle East conflict is in sight.

US President Donald Trump flagged progress in talks with Iran, Tehran has warned that major gaps still stand in the way of dialing down the conflict.