PHILADELPHIA -- Police say gunfire erupted at a southwest Philadelphia basketball court during halftime of an adult league game with hundreds of spectators, injuring six people, one critically.

Lt. John Walker of Southwest Detectives says about 500 people were at the 19-and-over league playoff game at Kingsessing Recreation Center when shots rang out at about 8:45 p.m. Monday.

He says five men and one woman were taken to the Hospital of the University of Pennsylvania, where one man hit in the stomach was in surgery but the others were stable with injuries to their lower extremities.

Walker said at least 11 shots were fired, and another person in the crowd may have returned fire.

Police pursued a male who ditched a revolver before escaping, but that gun had not been fired.