The U.S. Navy says an aerial drone malfunctioned and struck a guided missile cruiser during training off California, causing two minor injuries. Lt. Lenaya Rotklein says the accident on the USS Chancellorsville happened Saturday afternoon while the ship was testing its combat weapons system. She says two sailors were treated for minor burns. She says the ship is heading back to Naval Base San Diego so officials can assess the damage. The Navy is investigating the cause of the drone malfunction, AP reported.