Police suspect speed, fatigue and possibly alcohol were contributing factors to a double-fatality crash near Berrybank on Friday night.

Colac police highway patrol unit has initiated an investigation which will be handed over to Warrnambool-based highway patrol unit officers due to the location of the single-vehicle collision.

A 21-year-old driver and his 16-year-old passenger died after a crash about 11pm on Friday.

Police say the driver lost control of his Toyota HiLux, ran off the road and collided with a tree near an intersection at the Hamilton Highway and Berrybank-Wallinduc Road.

The Werneth male driver and his male passenger from Rockbank were pronounced dead at the scene.

Two sheep/cattle dogs were also located deceased at the accident scene.

Victoria Police said the exact circumstances surrounding the crash were still under investigation.

They asked anyone who witnessed the incident, or had information or dashcam footage to contact Crime Stoppers on 1800 333 000 or submit a confidential report at www.crimestoppersvic.com.au

Earlier: A 21-year-old driver and his 16-year-old passenger have died after a single-car crash in Berrybank late on Friday night.

It was reported to investigators a ute drove off the road and crashed into a tree near an intersection at the Hamilton Highway and Berrybank-Wallinduc Road at about 11pm.

The Werneth male driver and his male passenger from Rockbank were pronounced dead at the scene.

Victoria Police said the exact circumstances surrounding the crash were still under investigation.

They asked anyone who witnessed the incident, or had information or dashcam footage to contact Crime Stoppers on 1800 333 000 or submit a confidential report at www.crimestoppersvic.com.au.

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