Detectives in Bunbury are looking for anyone who may have witnessed an incident at a roadhouse in Myalup.
Last night at around 11:45pm, a driver of a Star Track truck with a double trailer parked at the southern truck stop at Settlers Roadhouse on Forest Highway.
He was then assaulted by a male, trying to steal the truck.
The driver did receive some minor injuries, however didn't see who the offender was.
The male then fled the scene but it is not known whether it was on foot or by car.
Anyone with any information regarding the incident should contact Police Crime Stoppers on 1800 333 000.