Fire crews were called to the scene. (Image: Archant)
Fumes triggered a fire alarm at a food plant in Norwich.
Fire crews from Carrow, Sprowston, Aylsham and Hethersett, and an aerial ladder platform from Earlham, were sent to the Unilever site on Bracondale at 12.46pm.
Andy Watts, factory manager at Unilever, said a drive belt slipped on one of its machines, with the rubber causing the fumes, but said there was no actual fire.
The fire service said it 'used breathing apparatus and hose reel jets to extinguish the fire. A thermal image camera was used to check the area.'
The firefighters spent about 30 minutes at the scene.
No-one was hurt.
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