Iran‘s Foreign Minister Javad Zarif, meanwhile, has landed in Baghdad for talks with Iraq’s leaders.
Protesters there are demanding their government stay out of the United States-Iran dispute.
Al Jazeera’s Rob Matheson reports from Baghdad.
US-Iran tensions: Iraqis fear involvement in dispute
With Iraq's plans to send delegations to Washington and Tehran to try to find a solution for the tension between the two countries, Iraqis fear their country could be caught in the middle.