A U.S. official said the decision stems from concern about a possible Iranian retaliatory strike on the first anniversary of the U.S. airstrike that killed Iran's top general, Qassim Soleimani.
The warning signals the administration’s increasing frustration and anger with ongoing rocket fire from Iranian-supported groups on or near the vast U.S. Embassy compound.
Iraq’s prime minister said Monday ahead of a much anticipated trip to Washington that his country still needs U.S. assistance to counter the threat posed by the Islamic State group.