By CBSNewYork Team

NEW YORK (CBSNewYork) — A little boy was found dead in a Harlem apartment Saturday, and sources tell CBS2 his death is now under criminal investigation.

Police were questioning two of the boy’s family members Saturday night, CBS2’s Nick Caloway reports.

READ MORE: SUV Crashes Into Manhattan Deli Following Collision With Second Vehicle; 6 People Injured

The tragedy struck inside a NYCHA apartment building at the corner of West 131st Street and Frederick Douglass Boulevard.

On the fourth floor, NYPD officers were guarding the door to the apartment where the 10-year-old boy was found unconscious and unresponsive Saturday afternoon.

He was rushed to Harlem Hospital, where he was pronounced dead.

“It’s sad. It’s just really sad,” neighbor Destiny Rogers said.

Police and paramedics responded to a call of an assault in the apartment around 2 p.m.

READ MORE: Firefighters Defy Elements, Rescue Man At Base Of Great Falls

Sources say they discovered the 10-year-old boy in the living room with severe bruising and lacerations.

Neighbors say they would see the boy out in the hallway sometimes. They were heartbroken to hear he was killed.

“I’ll pray for the little boy’s soul and pray for that family, you know what I mean? But I’m really sorry about that, to hear that,” neighbor Alvin Wallace said.

“When I came back to find out that this boy has lost his life, it just made me want to hold my nephew tighter. And it just gave me a big reality check on life,” Rogers said.

The boy’s name has not yet been released.

A group of advocates are holding a rally outside the apartment building at 2 p.m. Sunday to stand against violence.

MORE NEWS: Police: Woman Wanted For Punching MTA Bus Driver In Manhattan

CBS2’s Nick Caloway contributed to this report.

CBSNewYork Team