Arsonists are believed to have set fire to fly tipped waste in Haddenham.
A crew from Ely was called to a fire in the open on Ely Way at 4.09pm on Thursday, May 16.
Firefighters arrived to find a small pile of fly tipped waste well alight.
The crew used a hose reel to extinguish the fire and returned to their station by 5pm.
The cause of the fire is believed to be deliberate.
Anyone with information should contact Cambridgeshire Constabulary by visiting www.cambs.police.uk to submit an online report or call Crimestoppers on 0800 55511
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