Police are investigating the death of a 48-year-old man who was found tied up with a bag over his head at a home in Harlem Monday morning, a law enforcement official told NBC 4 New York.

Authorities said a woman visiting the home -- either a cleaning person or home health-care aide -- discovered the man in 87 Hamilton Place shortly before 10:30 a.m.

Police sources said the victim, identified as Charles Romo, was found on his knees on the bedroom floor with his hands tied behind his back, his legs tied with a belt and tape around his neck. He was pronounced dead at the scene.

More coverage from NBCNewYork.com

A neighbor told detectives she called police Sunday night after she heard screams from what she thought was an apartment on the first floor, police sources said.

The NYPD responded to her call and found nothing of concern on the first floor. The victim lived on the second floor, which police did not check out because of the nature of the emergency call, police sources told NBC 4 New York.

A medical examiner will determine the cause of death.

The investigation is ongoing.