Approximately 50 firefighters are currently tackling a blaze at a factory in Easton in Lincolnshire, Lincolnshire Fire and Rescue Service has confirmed.
The factory has been evacuated.
According to police, the blaze can be 'seen for miles'.
The public are advised to stay away due to possible toxic fumes from asbestos.
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No-one was injured in the blast and police do not believe it was linked to terrorism.