UPPER WEST SIDE, Manhattan (PIX11) — A construction worker at a Manhattan building fell several stories to their death Monday morning, police and fire officials said.

The incident happened around 11:25 a.m. at a building on West End Avenue near 72nd Street on the Upper West Side, according to the FDNY. The worker fell from a scaffolding on the fourth floor of the building and was pronounced dead at the scene, police and fire officials said.

While police say the worker fell from the fourth floor, a Department of Buildings spokesperson said the worker fell while installing netting around scaffolding at the 15th floor. The building has 23 stories. A full stop work order was issued after the fall, according to the DOB.

“Construction workers in our city deserve a safe working environment, and incidents like today’s fatal fall are completely unacceptable,” a DOB spokesperson said. “We are conducting a thorough investigation, along with our partners in law enforcement, into exactly how this could have happened, and to determine whether any corners were cut on the job which may have been contributing factors.”