SHARON HILL, Pa.—Authorities say a child was killed when gunfire erupted outside a high school football game near Philadelphia. Officials said the gunfire erupted shortly before 9 p.m. Friday near the main gate to the football field at Academy Park High School in Sharon hill shortly after the conclusion of the game between Pennsbury and Academy Park high schools. Fans, players and coaches ran for cover, and police from multiple Delaware County communities descended upon the school within minutes. The Delaware County Daily Times said its postgame interviews captured audio of seven shots in rapid succession. Authorities said one child was killed, with TV news stations reporting that the victim was a girl seven years of age or younger. WPVI-TV reported that two other juveniles were wounded, three people were detained and weapons were recovered. Deanna Bankston told reporters that she was standing next to the little girl who was …