Major Collision Investigation Unit detectives are investigating the circumstances surrounding a fatal collision in Glengarry on Tuesday.
Police were told three cars were involved in a collision at the intersection of Traralgon-Maffra Road and Farmers Road about 3.50pm.
The driver of one of the vehicles, a 35-year-old Glengarry man, died at the scene.
His passenger, a six-year-old-boy, was airlifted to hospital in a critical condition.
A 22-year-old Traralgon man, who was driving the second vehicle, was taken to hospital with minor injuries.
He is assisting police with their enquiries.
The four occupants of the third vehicle were not injured.
The exact cause of the collision is yet to be determined and the investigation is ongoing.
Anyone who witnessed the collision, has dashcam footage or information is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimestoppersvic.com.au