Motorcyclist killed in Adelaide crash

Police will interview a motorcyclist who fled the scene of a crash in which another rider was killed in Adelaide's south.

Emergency services were called to Onkaparinga Hills just after 2.30pm on Sunday following the crash involving two motorcycles and a car.

A 33-year-old man died at the scene after his bike collided with the back of the car, with the driver uninjured.

Police located the second rider, aged 21, after he left the scene on foot.

He suffered minor arm injuries and abrasions and will be interviewed by major crash investigators when he is released from hospital.