The Pentagon said two U.S. fighter jets dropped Friday, Aug 8, bombs on Islamic militants in Iraq towing artillery outside Irbil near U.S. personnel, the Associated Press reported.

Pentagon press secretary Rear Adm. John Kirby says two F/A-18 jets dropped 500-pound bombs on a piece of artillery and the truck towing it.

President Barack Obama authorized such airstrikes Thursday when the Islamic state militant group advanced on Irbil, in northeaster Iraq, where U.S. military trainers are stationed.