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WASHINGTON (WUSA9) -- DC FIRE/EMS officials say a worker has fallen down a hole at a construction site in Northwest and crews are trying to rescue him.

The incident happened in the 600 block of Massachusetts Ave NW at 7:45 a.m. Wednesday. Crews arrived on the scene about three minutes later, say officials.

Officials call this a "below grade rescue," saying the worker may have fallen down a hole as big as 50 feet.

There's no word on the extent of the worker's injuries.

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