The fire was reported at the former Britin Plastics company in the unit block of Elbow Lane just after 2:30 p.m. Thursday.
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The building was fully involved when firefighters arrived.
Crews say there were hazardous materials inside.
The view from Chopper 6 HD showed flames ripping through the roof of the building with black smoke rising into the sky.
The flames appeared to be out a few hours later.
There was no word on any injuries or a cause of the fire.