PHILADELPHIA (CBS) – Firefighters battled a large blaze at a dry cleaners in Roxborough on Monday morning.

The fire broke out around 4:30 a.m. at the Award Dry Cleaners at Ridge Avenue and Shurs Lane.

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There were no injuries reported, but heavy smoke and fire was visible for several hours on Labor Day morning.

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The fire was reportedly placed under control around 6:30 a.m.; however, fire crews remain on the scene treating hotspots.

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There is no word on what sparked the fire.