Norfolk Fire and Rescue Service say crews are attending the fire on Common Road.
Attempted break-ins at two Norfolk fire stations may be part of a trend of burglars trying to steal life-saving equipment to use in other crimes.
The fire service says a blow torch has ignited materials on the roof of the building.
More than 30 of Norfolk's fire stations are short of on-call firefighters, with fire chiefs looking to fill nearly 70 vacancies.
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