NEW YORK - Police are looking for the robber who attacked a man at gunpoint in Harlem Friday night.

It happened at an apartment building near West 147th Street and Amsterdam Avenue.

Surveillance video shows him approach the victim from behind, point a gun at his head and put him in a chokehold.

The victim lost consciousness, while the robber took his cell phone, wallet, cash and a backpack.

The victim was treated on scene for bruising to his neck.

The man police are looking for was last seen wearing a white shirt with the words "R.I.P Youth" on the front. 

Anyone with information on the case should contact the Crime Stoppers hotline at 1-800-577-8477, or text CRIMES and then enter TIP577, or visit www.nypdcrimestoppers.com.