Investigations are continuing into an incident at Bridgewater on Sunday where a 46 year old Ulverstone man received head injuries after falling off the back of a motorcycle.

Police have spoken to the pillion passenger who is recovering in the Royal Hobart Hospital, and would particularly like to speak to the rider of the motorcycle, who allegedly left the scene.

The rider is described as a young man, possibly in his 20s, wearing a helmet with the visor raised.

Anyone with information should contact Police on 131444 or Crime Stoppers on 1800 333 000.