Some 500 litres of diesel was stolen from a fuel tank and digger in Edgefield.
It happened between 5pm on Monday, July 1 and Tuesday, July 2, on Holt Road, and police are now appealing for witnesses.
Anyone who may have seen any suspicious activity in the area between the times stated, or anyone with information should contact PC Peter Davison at North Walsham Police Station on 101 quoting crime reference 36/45117/19.
Alternatively contact Crimestoppers anonymously on 0800 555111.
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