At 7.39pm on Sunday (24) one crew from St Neots was called to a fire on the A428 near St Neots.
Firefighters arrived to find a car well alight. Wearing breathing apparatus they extinguished the fire using a hose reel and returned to their station by 9pm.
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.