Police are investigating a fire which damaged an unoccupied house at Gagebrook overnight. 

Shortly before midnight, Bridgewater Police and Tasmania Fire Service attended a house fire on Viola Crescent. 

The fire was contained quickly but had caused damage to the underfloor section of the house. 

The cause of the fire is undetermined and remains under investigation. 

Anyone with information in relation to the fire or suspicious activity in the area around the time is asked to contact police on 131 444 or Crime Stoppers on 1800 333 000 or at crimestopperstas.com.au. Information can be provided anonymously. Quote OR 747858.