Major Crash Detectives are investigating a fatal crash that occurred around 12.50pm yesterday.
A truck collided with a Mitsubishi Magna sedan at the intersection of Armadale Road and Tonkin Highway in Forrestdale.
A woman in her 50s, the sole occupant of the Mitsubishi, died at the scene.
The driver of the truck was not injured and is assisting police with their inquiries.
Anyone who saw the crash is asked to call Crime Stoppers on 1800 333 000.