Tas teens critical after car crash

A group of teenagers who were not wearing seatbelts are fighting for their lives in hospital after a car being driven by a 16-year-old rolled several times.

The car carrying five teens aged between 16 and 19 rolled several times after coming off Baskerville Road in Gagebrook about 2am on Saturday.

All of the car's occupants were taken to hospital, with some in serious and critical conditions, as police investigate whether speed or alcohol may have been factors in the crash.