Police are appealing for witnesses following a car and caravan fire in Mansfield this morning.
Investigators believe a black Toyota Land Cruiser towing a bright green ski boat on a black trailer overtook a silver Subaru Forester towing a Scenic Galaxy caravan on Mansfield-Woods Point Road about 11.15am.
It is believed the Toyota was forced off the roadway and the car and caravan burst into flames.
The male driver of the car, a 73-year-old Weir Views man and his female passenger, a 71-year-old Weir Views woman received serious injuries and were air-lifted to hospital.
It is believed the black Toyota Land Cruiser overtook up to 8 cars prior to this incident.
Investigators are appealing to the occupants of these cars or anyone with dashcam footage or any information to contact Crime Stoppers on 1800 333 000 or submit a confidential report at www.crimestoppersvic.com.au.