Baghdad:A Katyusha rocket hit an air base housing US-led coalition forces in Iraq's western province of Anbar, the military said.
"A Katyusha rocket landed at about 1.50 p.m. on Monday at the edge of Ayn al-Asad Air Base in Anbar province, without casualties," the media office of the Iraqi Joint Operations Command said in a statement.
Read:Drone targets U.S. troops in northern Iraq
Wayne Marotto, spokesman of the international coalition forces in Iraq, said the damage is being assessed and the attack is under investigation, reports Xinhua news agency.