A 62-year-old white man who was allegedly punched and knocked out last week by a black man who declared he would attack the first white person he came across has died, law enforcement sources said Monday.

The man was one of three people allegedly beaten Wednesday in Union Square by the suspect, LaShawn Marten, 31.

NYPD's Hate Crimes Task Force is investigating.

Police said the suspect punched the 62-year-old man in the face, and then punched a 48-year-old person and an 18-year-old person, both also white.

The 62-year-old slipped into a coma after the attack, and died Monday. The other victims were treated at hospitals and released.

The suspect "made statements to the effect that ‘I’m going to punch the first white man that I see,'" Police Commissioner Ray Kelly said last week.

The suspect's lawyer information was not immediately available.