Two Navy fighter jets collided over a military base, killing one pilot and injuring another, authorities said. The F18-C Hornet jets from Lemoore Naval Air Station were practicing dogfighting maneuvers at about 11:15 a.m. Monday when they crashed above Fort Hunter Liggett, a remote Army Reserve base 150 miles south of San Francisco, said a Navy spokesman. The pilots were using the airspace above Hunter Liggett's 165,000-acre training range at the time, said Mark Hamelin, the base's site manager. One pilot ejected and was in good condition. He was en route to Lemoore by late afternoon. The cause of the crash, which sparked several small fires, is under investigation.