Police are investigating after a 30-year-old Esperance man was killed in a crash on the South West Highway.
It is believed that the man was the back seat passenger in a Nissan Patrol, which lost control before rolling and hitting a tree.
The incident occurred sometime between 2am and 7.30am on Saturday in Keysbrook.
Police believe there were two other people in the vehicle at the time of the crash.
These people are yet to come forward and their injuries are unknown.
Anyone who can assist in this investigation is asked to call Crime Stoppers on 1800 333 000.