Firefighters are tackling a blaze at a workshop in Worlingham, near Beccles, which involves asbestos roofing.
At least seven appliances have attended College Lane after the fire service was alerted at about 8.55am. There had been multiple calls about a workshop on fire on Ellough Industrial Estate.
Fire was discovered in the extractor fan of the building, which was well alight and measures 25m by 40m.
Crews believed cylinders were in the building and an unknown quantity of painting materials were also involved as well as asbestos roofing.
Firefighters at the rear of building were trying to stop the blaze spreading using two breathing apparatus, two jets and two hosereels.
A spokesman for the fire service said crews had taken the relevant precautions to limit the damage to the environment and to themselves.
Police have also attended for traffic control.
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