VANDALS broke into and set light to a toilet cubicle at Wisbech Park.
Two fire crews from Wisbech were called to deal with the fire on Tuesday evening.
A fire service spokesman said: “This was a small fire in a toilet cubicle, located within a toilet block in Park Road.”
Firefighters used one hose reel to extinguish the fire before using positive pressure ventilation (PPV) fan for assistance with smoke clearance.
Crews returned to their stations within 40 minutes.
“The cause of the fire is believed to be deliberate,” said the spokesman.
Anyone with information should contact the police on 101 or the independent charity Crimestoppers anonymously on 0800 555111, or by logging onto www.crimestoppers-uk.org.
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