Tragedy struck the Upper West Side on Monday as a family of four was found dead in their Manhattan apartment. The victims, identified as a 41-year-old man, a 40-year-old woman, a 3-year-old boy, and a 1-year-old boy, all suffered fatal injuries to their necks, according to police officials.

The discovery was made after a building superintendent, who is related to the victims, became concerned when he hadn't heard from the family since Sunday. He decided to check on them and went to their fourth-floor apartment. When no one answered the door, he drilled a hole in it to remove the lock. What he saw through the hole shocked him, prompting him to immediately call 911.

First responders arrived at the scene and found the woman's body in the hallway of the apartment. The man's body was discovered in a bedroom. Tragically, the two young children were found in the living room, both with multiple stab wounds. Three knives were found near the victims, one of which was lying on the bed next to the man.

Authorities initially reported that the 3-year-old child was a girl, but later corrected the information. The victims were all members of the same family, and the father who died was the building superintendent. The precise motive for the killings remains unknown, as investigators have found no note or signs of forced entry.

The incident has left the community in shock, with neighbors gathering outside the building, watching as detectives and uniformed police officers investigate the scene. The medical examiner has arrived to determine the causes of death.

At this point, the NYPD is treating the deaths as a possible murder-suicide, but all angles are being investigated. The building superintendent's discovery and subsequent emergency call have shed light on the tragic events that unfolded. As the investigation continues, the community mourns the loss of this family, awaiting answers and hoping for justice to be served.