At around 2.05am this morning, police were called to attend a two car crash on Chapman Road in Glenfield involving a Holden Commodore and Ford Futura.
Both cars were on fire when emergency services officers attended the scene.
Three people were found deceased at the scene. Police say these people are yet to be identified.
It is believed that the crash occurred when the Ford Futura collided with the rear of the Holden Commodore.
The male driver of the Ford Futura and sole occupant of the vehicle left the scene after the crash, but was apprehended by police a short distance away.
He has been conveyed to Geraldton Hospital with unknown injuries.
Major Crash officers will arrive from Perth this morning to carry out further examination of the scene.
Chapman Road is closed between Macedonia Drive and Hagan Road until further notice and motorists are asked to avoid the area.