Police said a Nissan four-wheel-drive was travelling along Frys Road near Colac Lavers-Hill Road just after 2.30pm on Saturday when the driver was believed to have lost control of the vehicle, which rolled a number of times.

A 16-year-old girl from Barwon Heads who was a passenger, died at the scene.

The driver, a 20 year old man from Clifton Springs, and another female passenger received minor injuries.

Anyone with information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au

A 36-year-old Warrnambool man has also died following a separate crash at South Geelong on Saturday.

Police said the man was a passenger in a Holden Commodore station wagon travelling east along Barwon Terrace, near Bellerine Street, just before 2.30pm.

It is believed a Toyota Landcruiser utility attempted to turn right into Bellerine Street when the collision occurred.

The Warrnambool man was taken to hospital where he died a short time later. No-one else was injured.

Geelong Highway Patrol officers are still investigating.