A driver has died when his truck left the road and crashed in Donnybrook, about 210km south of Perth, on Wednesday night.
The 38-year-old man was the sole occupant, according to WA Police.
The white Isuzu Truck was travelling south on Greenbushes-Grimwade Rd when it crashed about 9pm.
The driver died at the scene.
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Investigations are ongoing and police urge anyone with relevant information, CCTV or dashcam footage to contact Crime Stoppers.