One person was killed and several others injured when a multistory parking garage in lower Manhattan partially collapsed April 18.

The cause of the Ann Street building’s collapse at about 4 p.m. was still under investigation, New York City Dept. of Buildings Acting Commissioner Kazimir Vilenchik said during a press conference. He said the four-story building had “pancaked” all the way down to the cellar floor. DOB engineers were checking adjoining buildings and studying drone footage from inside the garage to identify a possible cause of the collapse.

NYC Dept. of Buildings records show an outstanding violation issued in 2003 which noted “defective concrete” with spalling and cracks in the first floor ceiling slab of the structure. A certificate of occupancy was first issued in 1957. The last work permit on record for the site was issued in 2015 for installation of overhead protections. 

A nearby Pace University building was also deemed unstable and evacuated, officials said.

John Esposito, chief of operations for the New York City Fire Dept., said the rescue operation was “extremely dangerous.” Firefighters rescued one worker from the top of the garage by moving him to an adjacent building, Esposito said. FDNY ended up pulling firefighters from the building and using a “robot dog” and drones to check the garage in case anyone else was still inside, he said.

“We had firefighters inside the building conducting searches, the building was continuing to collapse,” Esposito said. “We made the decision to remove all our people from the building.”

Officials believe everyone is accounted for, Esposito added. One worker at the garage was dead on arrival, Mayor Eric Adams told reporters. Their name has not yet been released. Four people were hospitalized and are in stable condition, and a fifth survivor refused medical attention.