A crew from Stanground was called to a fire in the front garden of a home in Lavender Close.
Firefighters used a hose reel to extinguish the fire and returned to their station by 10.49pm.
Cause of the fire was deliberate.
Anyone with information should contact police on 101 or call Crimestoppers anonymously on 0800 555 111.
For advice on bonfire safety, please click here.