All lines of enquiry have been exhausted following a suspected arson attack in West Caister.
Police and fire services were called to a barn off the A149 Caister bypass in West Caister just after 2pm on Saturday, October 28.
Nobody was injured, but a boat inside the barn was damaged.
The incident is being treated as arson.
Anyone who witnessed the incident or saw suspicious activity in the area at the time can call Norfolk Police on 101.
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