A truck driver has been taken to hospital after his vehicle rolled in Haynes yesterday.
The man was driving along Armadale Road about 5.30pm when his truck and trailer lost balance and tipped.
Firefighters were called to the scene to clean-up leaking fuel and oil from the truck.
It is believed the trailer did not contain dangerous goods.
Police are investigating whether speed was a factor in the crash.
The man was taken to Royal Perth Hospital with a suspected fractured shoulder.