WATCH: Police Save Suicidal Brooklyn Man, Engineer of Collapsed Construction Site

Dramatic video uploaded to YouTube by a Brooklyn community watchdog early Friday morning shows two NYPD officers tackling — and saving — a man who was reportedly threatening to jump off his roof in upper Midwood, Brooklyn, near Flatbush and Ditmas Park.

In additional photos and videos sent to Patch, the man’s wrists appear to be bleeding profusely. Police then appear to offer the man some kind of towel to clean them with — and tackle him when he leans forward to grab it.

“An emotionally disturbed person was removed to Kings County Hospital at about 7:30 this morning,” an NYPD spokeswoman told Patch.

The incident occurred on the roof of 1034 East 12th Street — the same address listed for Avishay Mazor, the structural engineer who designed a construction site that collapsed at 656 Myrtle Avenue in Bed-Stuy on Thursday afternoon.

Fernando Venegas, a 19-year-old construction worker from Queens, was fatally crushed by a wall at the site.

The distraught man in Rosenberg’s video appears to be Mazor. Sources in the field confirmed his identity to Patch.

A person who answered the phone at Mazor’s home late Friday morning sounded as if he’d been crying. He said he’d call back, but never did.

Patch called the same number in the immediate aftermath of Thursday’s deadly accident in Bed-Stuy. At that time, a female representative for Mazor, who would not give her name, said: “I have no information. I just know that a wall collapsed.”

“We designed it,” Mazor’s representative said of the construction project. ”We’re not the inspecting engineers.” When asked what type of building was planned for 656 Myrtle, she said: ”I can’t speak to that.”

In online listings, Mazor advertises his specialties as ”fire protection engineering and installation and safety installation.”