The victim, identified only as being 39 years old, apparently had a piece of clothing caught on the train, law enforcement sources told New York City’s WNBC-TV.
The victim was later found in the East River tunnel used by the No. 7 train line, which connects Manhattan and Queens. Service on the line was interrupted for several hours, the report said.
The train also experienced “a mechanical problem as a result of the impact,” subway officials said in a Twitter message.
No further information was immediately available.