A 14-year-old boy is facing murder charges after being accused of punching a 94-year-old man who later died.

The teen was not identified because of his age. He was initially charged with aggravated assault and endangerment following the Jan. 3 attack in the lobby of a Collingswood apartment complex.

Authorities have said the boy was among a group of teens playing in the lobby, but haven't said what spurred the attack, which was captured on surveillance video.

Camden County prosecutors said the victim, Anthony Donofrio, suffered blunt force trauma and died a week later. His death was ruled a homicide.

The teen was also charged with endangering an injured victim.