Australian Broadcasting Corporation

In short:

One adult and two children are dead after a car crashed into a truck in western Victoria.

A second adult, who was trapped within the car after it rolled and was crushed, has been flown to hospital with life threatening injuries.

The truck driver is understood to have escaped with minor injuries.

An adult and two children have died after a car and truck collided at Stoneleigh in western Victoria.

A three-year-old boy and his parents have died after their car was hit by a truck at Stoneleigh in western Victoria.

The boy's grandmother was trapped in the wreckage and flown to hospital with life-threatening injuries. She is the sole survivor.

Victoria Police said the family's car failed to stop at a stop sign at about 9:30am and was T-boned at the intersection of Mount William Road and Eurambeen-Streatham Road, about 45 minutes west of Ballarat.

Detective Inspector Craig McEvoy said the car spun several times before landing on its passenger side.

An adult and two children have died after a car and truck collided at Stoneleigh in western Victoria.

Victoria Police said the vehicles crashed just after 9:30am at the intersection of Mount William Road and Eurambeen-Streatham Road, 45 minutes west of Ballarat.

Police said the car appeared to have rolled and been crushed.

A second adult, who was trapped in the vehicle, has life-threatening injuries and is expected to be flown to hospital.

The truck driver is understood to have escaped with minor injuries.