By CBSNewYork Team

NEW YORK (CBSNewYork) — Part of a brownstone building in Brooklyn collapsed Tuesday.

Citizen app video shows the staircase crumbled outside the three-story building on Carlton Avenue in Prospect Heights.

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The Department of Buildings has issued a full vacate order after the decorative stone arch above the front door collapsed onto the stoop.

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All tenants have been offered emergency relocation assistance by the American Red Cross.

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The DOB also issued the property owner a few violations, including failure to maintain the building.

CBSNewYork Team