FULL STORY: To read the full story on this crash click here
UPDATE 5.30PM: Passers-by used water from a roadside puddle to stop a fire and save the life of a New South Wales man seriously injured in a head-on smash on the Northern Highway.
A witness has told how the first people on the scene used water from a puddle beside the highway to extinguish a fire in the car as the seriously injured 38-year-old man sat trapped in his wrecked vehicle.
The witness said a blanket was also used to put the fire out.
She said people tried to free the man but couldn't.
Leading Senior Constable Darren Scherger of Goornong police said the witnesses saved the injured man's life.
The latest condition of the man was listed as 'serious'.
UPDATE 5.20PM: A 38-YEAR-old man is being airlifted to a Melbourne hospital after the vehicle he was driving collided with a tree on the Northern Highway about 4pm.
Police at the scene have confirmed the man was driving towards Heathcote.
He sustained serious injuries to his chest and legs in the crash.
The man was the sole occupant of a Volkswagen sedan which has been extensively damaged.
EARLIER: A MALE driver has been seriously injured after a car hit a tree head-on on the Northern Highway between Toolleen and Heathcote.
State Emergency Services, Country Fire Authority and Ambulance Victoria paramedics have just freed the man.
The Ambulance helicopter has landed in a paddock beside the crash scene.
The Northern Highway is blocked in both directions.
The car has been extensively damaged.
More to come.