Iraq fires 4 rockets at Balad airbase housing US troops

Four rockets have hit Balad airbase in Iraq that hosts US troops. Four Iraqi airmen are reportedly injured. As per Reuters, the attack involves mortar shelling as well. The news agency said that mortar bombs fell on the airbase's runway. The airbase is located 80 km north of Iraqi capital Baghdad. It is being reported in world media that Katyusha rockets have been fired at the airbase