NEW YORK - Police in New York were searching for a gunman after a shooting incident at a construction site on Manhattan's West Side on Thursday (Oct 5), in which one person was killed, US media reports said.

The gunman reportedly shot a construction worker in the head at a building being constructed at West 59th Street near 11th avenue, NBC news reported.

The Daily Mail cited witnesses as saying the victim was a foreman who was shot by another construction worker.

New York police are asking people to avoid a swathe of Manhattan from West 57th to West 59th Street and between 11th and 12th avenue.