At least 14 rockets hit western Iraq's Ain al-Asad air base, host to U.S. and other international forces, on Wednesday, slightly wounding three people, local media reported citing a coalition spokesman.

U.S. Army Colonel Wayne Marotto, spokesman for the U.S.-led international military coalition, tweeted that the rockets landed on the base and its perimeter.

The United States accuses Iranian-backed militia groups of launching regular rocket attacks against its troops in Iraq.

There was no immediate claim of responsibility for Wednesday's attack.