Update: As of Tuesday evening, a St George Hospital spokesperson told the Mercury the 21-year-old man was in a critical but stable condition.
A man has serious head injuries after he crashed his ute into a tree near Minnamurra.
The man, who is believed to be in his 30s, was driving along Riverside Drive before he drove into a tree on the side of the road.
He has been freed from the car and is expected to be airlifted to St George Hospital shortly.
Three ambulance crews and police are on scene.