Multiple people shot at a New York concert

At least one gunman has opened fire at a rap concert in New York killing one man and leaving three injured.

Revellers were filmed fleeing the T.I. convert at Irving Plaza an hour ago at 10:15pm local time after an unknown number of gunmen opened fire into the crowd as the rapper was preparing to go on stage.

A 33-year-old man shot in the stomach died in hospital, the New York Times reports. A 34-year-old man shot in the chest is in a critical condition and a 26-year-old woman shot in the leg is in a stable condition ABC7 reports.

A fourth person reportedly admitted themselves to a medical centre with a gunshot wound however their condition is unknown.

TMZ reports the shooting commenced following an argument between a group of males and females.

Paul Cantor, 34, told the New York Times he witnessed what he thought was the altercation leading up to the shooting.

"There was a body that came across the stage, sort of with flailing arms," he said.

This reportedly led to a second fight followed shortly by gunfire.