CAMDEN, N.J. (AP) — A masked man carrying a gun and a machete entered a parked car and opened fire on five young adults inside, killing the driver and a passenger and wounding the others, then pushed aside the driver's body and drove off with four of the victims inside, authorities said, in a startling burst of violence even for a city consistently ranked as one of the nation's most dangerous.

It was not clear whether the gunman knew anyone in the car or what sparked the shooting late Saturday, Camden County prosecutor's spokesman Jason Laughlin said. The gunman eventually fled and remained at large Sunday, authorities said.

The car was parked in an alley when the masked man approached and got in on the driver's side, Laughlin said. He fired several shots, killing the 18-year-old driver, Jewel Manire, and Khalil Gibson, 20, of Camden.