On Saturday (28) at 6.55pm a crew from Chatteris was called to a road traffic collision on Fenside Road, Warboys.
The crew arrived to find one car well alight. Firefighters used one hose reel to extinguish the fire before returning to their station by 8pm.
The cause of the fire is believed to be deliberate. Anyone with information should contact police by visiting www.cambs.police.uk to submit an online report or call Crimestoppers on 0800 555111.