One man was killed and another injured when a gunman opened fire during a fight in Staten Island, authorities said.

The unidentified victim was shot in the chest around 4:15 a.m. Monday at the corner of Tompkins and Vanderbilt avenues, cops said.

He was rushed to Richmond University Medical Center in traumatic arrest and later died, officials said.

The man’s 17-year-old pal was also shot in the left arm during the melee but was not seriously injured. He was taken to the same hospital for treatment.

The shooter is still on the loose and no description was immediately available.