NEW YORK (AP) — A Manhattan high-rise remained unstable Tuesday after officials found that columns buckled and floors sagged while it was being converted to luxury apartments, forcing evacuations in and around the Midtown construction site.

The former headquarters of pharmaceutical giant Pfizer is in a busy corridor just down the street from New York City icons like the Chrysler Building and Grand Central train station. Drones and city officials were busy checking out the building.

“This is a minute-by-minute assessment,” Mayor Zohran Mamdani told reporters near the scene.