At 8.32am on Saturday (20) one crew from March was called to a fire on Lime Grove in March.
Firefighters arrived to find a fire outside a house and extinguished it using a hose reel. They returned to their station by 9.30am.
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.