An off-duty transit worker was shot in Brooklyn Tuesday after being in the crossfire of a fight on the subway.

Sources say Carlo Thorne was grazed in the arm when shots rang out on a 3 train as it approached the Sutter Avenue stop.

Two groups of young men had been fighting.

"The dispute eventually became physical between the two groups. As the train pulled intop the Sutter Avenue and Rutland Road Station, the train stopped, the doors opened and one of the males from one of the groups exited the train, and while on the train platform, displayed a gun and fired into the train, striking our victim," said NYPD Chief Michael Kemper.

Thorne works as a supervisor for New York City Transit.

He is expected to be okay.