Police are investigating after a person was seriously injured in an incident in West Ulverstone on Saturday night.

Initial inquiries indicate the 21-year-old man received a head injury, in the vicinity of the West Ulverstone Football Club, Amy Street, West Ulverstone.  Police are investigating whether he fell from the rear of a vehicle.

He sought medical treatment early on Monday morning and was airlifted to the Royal Hobart Hospital. He remains in a critical condition.

Investigations are underway and anyone with information is asked to contact Ulverstone Police on 131 444.