Police are investigating the circumstances surrounding a fatal crash which occurred south of Colac on Monday afternoon.
Investigators believe a truck was travelling along Forrest-Apollo Bay Road near Tanybryn about 1.45pm when the driver lost control of the vehicle, which then left the road and crashed into a tree.
A passenger in the truck, believed to be a man in his 30s, died at the scene.
The driver of the truck, believed to be a man in his 20s, was taken to hospital with minor injuries.
The exact cause of the crash is yet to be determined and the investigation remains ongoing.
Victoria Police major collision unit members attended the accident scene on Monday.
Anyone who witnessed the crash or who may have dashcam footage is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report at www.crimestoppersvic.com.au.
There have been 126 lives lost on Victorian roads this year compared with 165 at the same time last year.
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