The collapse happened behind 442 Main St. in Poughkeepsie, according to the city's fire department.
All fire companies have cleared the scene as of 9:30 a.m. on Monday, but there is expected to be work in the area all day, firefighters said.
Residents are asked to avoid the area of the collapse.
More information about the cause of the collapse has not been released.
This is a developing story. Check back to Daily Voice for updates.
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