Major Collision Investigation Unit detectives are investigating the circumstances surrounding a fatal collision which occurred in Thomastown this morning.
Emergency Services were called to Mahoneys Road about 1.10am after an allegedly stolen Kia Cerato and a Mercedes SUV had collided.
Police and ambulance crews commenced CPR on one of the occupants of the Cerato but she could not be revived.
A female passenger from the Cerato and a man and a woman from the Mercedes were taken to hospital with injuries.
Investigators believe another person was driving the Cerato but left the scene before police arrival.
Mahoneys Road is expected to be closed till later this morning while the scene is examined.
Anyone who witnessed the collision, with information or dashcam vision is urged to call Crime Stoppers on 1800 333 000 or log onto www.crimmestopersvic.com.auExternal Link.