Up to 200 workers were evacuated from a factory in King's Lynn following a fire at lunch time.
The blaze broke out in an extraction unit at Cooper Roller Bearings in Wisbech Road, South Lynn at 12.45pm today (Monday).
Four crews from Lynn and Sandringham attended and the fire was under control in about an hour.
A fire service spokesman said no-one had been injured and the cause of the fire was thought to be mechanical.
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