Two people have died following a serious crash in Korumburra this afternoon.

Officers have been told a car was stationary waiting to turn right, on the South Gippsland Highway about 3.30pm when it was hit from behind by another vehicle.

The impact caused the car to cross over to the other side of the road and collide with an oncoming truck.

The driver of the car, believed to be a woman in her 30s and her passenger, believed to be a young boy, died at the scene.

The driver of the second vehicle, a 59-year-old Bass man is in custody and the truck driver is speaking with police.

Detectives from Major Collision Investigation Unit have been notified and are en route.