An off-duty FDNY EMT was killed by a hit-and-run driver on the Koszciusko Bridge on Saturday night, police said.

According to the NYPD's Highway Collision Squad, Kevin Liang, 27, was riding his motorcycle eastbound on the Kosciuszko Bridge's mid-span when he was fatally struck by a driver attempting to change lanes.

After he was hit, Liang, a Bay Ridge resident, lost control of his motorcycle and skidded across the highway into the right lane, police said.

He was taken by EMS to Woodhull Hospital, where he was pronounced dead.

The driver did not remain on the scene, and the collision squad's investigation is ongoing.