A speeding sport utility vehicle smashed into a commuter rail station early Tuesday, killing the driver and two pedestrians and injuring a third person, police said. The SUV driver went out of control on a bend in the roadway and traveled diagonally across an intersection before jumping a curb and slammed into a turnstile and then the wall of the Southeastern Pennsylvania Transportation Authority's Kensington and Allegheny station shortly after 2:30 a.m. Tuesday, police said. "It sounded like a bomb went off and everyone started running away," witness Ariana Kmecak told WPVI-TV. The SUV driver, a female pedestrian and a male pedestrian were pronounced dead at the scene. Another pedestrian was taken to Temple University Hospital in serious but stable condition. The names of the victims weren't immediately released. Chief Inspector Scott Small told reporters that a police officer on patrol in the area saw and heard the vehicle and reported that it was "obviously travelling at a very, very high rate of speed." The cause of the crash remains under investigation.