A garage block was set on fire in Thetford.
Two people were seen fleeing the scene after the blaze at about 7.25pm on Monday in Elm Road, close to Fir Road.
A crew of seven firefighters from Thetford tackled the fire.
No-one was hurt.
Anyone who witnessed the incident or have any information should contact PC Charlotte Green at Thetford Police Station on 101. The crime reference is 36/1485/20.
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