The New York Police Department is investigating after video showing three people in overalls and headlamps emerging from a Manhattan manhole went viral on social media.

The NYPD confirmed to Fox News Digital that the incident occurred on Aug. 18 at 4:19 a.m. on the southeast corner of 32nd Street and Seventh Avenue, which is near Penn Station.

No arrests have been made in this case, but police said they are reviewing surveillance video.

NYPD detectives told WABC that they believe many of the people who have been caught on camera doing this are migrants searching for valuables in the sewers.

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