At 5.22pm on Sunday (24) one crew from Stanground was called to a fire on Ramsey Road in Whittlesey.
Firefighters arrived to find a van well alight. Wearing breathing apparatus they extinguished the fire using a hose reel and returned to their station by 6.50pm.
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.