July 31, 2020 | 8:22am

A 30-year-old man was found dead early Friday in back of an Upper West Side apartment building, and investigators believe he tumbled to his doom from a fire escape, according to cops.

The victim, whose name was not immediately released pending family notification, was found unconscious and unresponsive at around 2:10 a.m. behind the building on West 81st Street near Amsterdam Avenue, police said.

He was pronounced dead on scene.

It wasn’t immediately clear whether he fell from the escape on his own or someone pushed him, according to police sources.

Investigators are looking to speak with a person who was with him at the time.

The city Medical Examiner’s office will officially confirm his cause of death.