A drill struck the top of an occupied F train in Long Island City on Thursday, nearly missing the subway car, according to the MTA.
The drill, which had a 10-inch wide bit, according to published reports, was being used for a construction project involving the East Side Access project. It hit the train shortly before noon just outside of the 21st Street station.
The drill damaged the top of the car, but did not enter it, the transit agency said. No one was injured.
About 800 riders, who were on the train, had to be taken off and led back to the station.
The MTA is investigating the incident.