A property in Three Holes was “considerably damaged” after an arson attack.
Police are appealing for witnesses to the fire, which took place between 1am and 2.15am yesterday (Thursday) on Main Road.
The fire was extinguished but considerable damage was caused to the building.
No one was injured as a result of the fire.
Officers are keen to speak to anyone who believes they may have seen any suspicious behaviour in the area around this time.
Witnesses are asked to contact PC Stewart Ledward at Downham Market Police Station on 101 or Crimestoppers anonymously on 0800 555 111.