Emergency services responded to a single vehicle fatal crash in Tooradin last night.
It's believed the vehicle may have been involved in a collision with another car prior to it losing control.
The vehicle left the road on South Gippsland Highway and rolled just near Baxter-Tooradin Road just after 8.30pm on 6 July.
There were three occupants in the car and one, who is yet to be formally identified, died at the scene.
The other two occupants were taken to hospital with serious injuries.
The exact circumstances surrounding the collision and crash are yet to be determined and investigations remain ongoing.
Anyone who witnessed the incident, has CCTV, dashcam footage or any other information that could assist police is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au