An explosion on the roof of a seven-story apartment building at 305 East 95th Street in Manhattan’s Upper East Side ignited a three-alarm fire on Friday morning, sending thick black smoke over the neighborhood and prompting a large emergency response. The New York City Fire Department deployed more than 100 firefighters and other first responders after the blast, which was reported shortly after 10 a.m. local time. Residents were evacuated, and the building’s superintendent was treated for minor injuries, officials said. Preliminary reports indicate the incident may have been triggered by gas fumes that accumulated in the building’s basement, but fire marshals are still investigating the exact cause. Authorities warned nearby residents to keep windows closed and expect traffic disruptions while crews work to fully extinguish the blaze and secure the site.