On Tuesday (30) at 8.44pm two crews from Cambridge and one crew from Papworth were called to a car fire on Fen Road, Milton.
Crews arrived to find a car well alight in a ditch. Firefighters used one jet to extinguish the fire before returning to their stations by 10.45pm.
The cause of the fire was deliberate. Anyone with information should contact police by visiting www.cambs.police.uk to submit an online report or call Crimestoppers on 0800 555111