WORCESTER, Mass. —

Crews are battling a three-alarm fire at a business in Worcester, fire officials say.

The fire broke out at around 8 p.m. Monday at 821 Main St. Officials say there was initially smoke in the basement of the building, followed by a partial floor collapse.

All firefighters were ordered out of the building.

Heavy fire was also found in the building's attic area. Firefighters believe the fire may have begun in a nearby vacant business that was under construction.

No one was injured in the fire.

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