Major Crash officers are investigating a fatal crash which occurred in Mandurah on Sunday evening, 9.30pm.
The crash occurred when a black BMW motorcycle travelling south collided with a red VW Golf at the intersection of Mandurah Road and Pinjarra Road Mandurah.
The 19-year-old male rider of Mandurah and his 19-year-old pillion passenger of Mirrabooka suffered serious injuries and were conveyed by ambulance to Royal Perth Hospital for medical treatment.
The rider of the motorcycle died later in hospital as the result of his injuries. The pillion passenger remains in a serious condition.
Major Crash investigators are seeking witnesses who may have seen the motorcycle driving in the Mandurah area prior to the crash to call Crime Stoppers on 1800 333 000 or make a report online at crimestopperswa.com.au.