CAMDEN, N.J. (CBS) —  Heavy smoke and flames ripped through a recycling business in Camden, New Jersey Saturday afternoon.

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Firefighters responded to the National Paper Company around 3 p.m.

The original fire began at a recycling warehouse but has since spread to a similar building in the 1500 block of Ferry Avenue.

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It appears there was a lot to burn. National paper says it collects packages, recycles and sells more than 7,000 tons of recovered paper each month.

No injuries have been reported.

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The cause of the fire is under investigation.