THE BRONX, N.Y. (WPIX) - An apartment building partially collapsed on Wednesday morning after a reported gas explosion in the Bronx, according to the New York City Fire Department.

The blast caused an incinerator shaft collapse around 8:10 a.m., according to the FDNY. No injuries were reported, fire officials said.

Officials told Nexstar's WPIX that at least 40 apartments had been evacuated and gas had been shut off to the rest of the building. K9 units also searched 10-foot-high piles of debris for any potential victims.

New York City Mayor Eric Adams posted on social media, saying, "I have been briefed about the emergency situation taking place in the Mott Haven area of the Bronx. We are getting a full assessment from first responders and will continue to provide updates. Please avoid the area for your safety."

Crews from Con Edison and inspectors from the Department of Buildings were also on the scene investigating the cause of the incident, WPIX was told.

A NotifyNYC alert warned of traffic delays in the area due to emergency personnel near Alexander Avenue and East 135th Street.

The collapse happened just as some residents in the area were dropping their children off at the nearby school, P.S. 154 Jonathan D. Hyatt Elementary School, as well as the NYCHA Mitchel Day Care Center. One witness, Diamond Freeman, told WPIX that she heard a “big boom” moments before the scene unfolded.

"When you looked out, the whole building just went boom -- it fell. Then you heard another boom, and all the side of the building just fell. It was crazy," she said. "All you see is smoke.”

The incident comes one week after a fire in the same building left a teenage girl in critical condition and a medically induced coma, according to the FDNY and the family of the teen.

It also comes two years after another apartment building collapsed in the Morris Heights neighborhood of the Bronx.