Iran's National Security Council said it had attacked the US base at Al Udeid -- its largest in the region -- in retaliation for American strikes on its nuclear facilities.

"There have been no attacks so far on Ain al-Assad," a major Iraqi airbase in Anbar province hosting American troops and other personnel from the US-led coalition against jihadists, said a security official in the province.

"We are monitoring the situation in case anything happens," the official added, speaking on condition of anonymity to discuss sensitive matters.

A military source in Baghdad, also speaking on condition of anonymity, confirmed that "for the moment, Ain al-Assad has not been targeted", and neither had the base at Baghdad International Airport, where US troops are also deployed.

He added that the bases were "on security alert".

Likewise, no attacks were immediately reported at the military base of the anti-IS coalition at the airport in Arbil, the capital of the northern autonomous Kurdistan region.

Iran's official press agency IRNA had reported earlier that Iran launched missiles "against American bases located in Qatar and in Iraq".

But in its announcement of the attack on the base in Qatar, the National Security Council made no mention of Iraq.