Two crews from Cambridge were called to some cardboard boxes on fire in a covered car port in Tamarin Gardens, Cherry Hinton.
Firefighters used a hose reel to extinguish the fire and returned to their stations by 10.57pm.
Cause of the fire was deliberate.
Anyone with information should contact police on 101 or call Crimestoppers anonymously on 0800 555 111.
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Fears Cambridge market could shrink following revamp
Traders fear £12.6m plans to upgrade Cambridge Market Square will result in it shrinking.
Woman found dead in Little Shelford
A man has been arrested after a woman was found dead in Little Shelford.
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