Major Collision Investigation Unit detectives are investigating after a three-vehicle collision in Frankston on Friday, 13 May.
Emergency services were called to the Frankston Freeway, northbound, near Cranbourne Road to reports of the collision involving a truck and two cars about 11am.
Investigators have been told traffic had slowed after a dog was seen running on the road when the truck collided into the rear of a Ford Territory which in turn collided into a Ford Focus.
The driver of the Territory, an 82-year-old Seaford man, was taken to hospital with life-threatening-injuries.
The driver of Focus was uninjured.
The driver of the truck, a 42-year-old St Albans man, was uninjured and is assisting police with their enquiries.
The dog ran from the scene and has not been located.
Investigations into the incident remain ongoing.
Anyone who witnessed the collision, has dash cam footage or any other information that could assist police with their enquiries is urged to contact Crime Stoppers on 1800 333 000 or submit a confidential report online at www.crimstoppersvic.com.auExternal Link