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PRINCETON, N.J. (CBS) — A 3-alarm fire has damaged several two-story townhouse units in Princeton.

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Firefighters rushed to 27 Sergeant Street around 5:15 a.m. Saturday morning to battle a fire that spread to three units.

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Authorities say that dozens of people have been displaced due to the fire causing smoke and water damage.

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There is no word on injuries or how the fire started.