A powerful explosion has shaken Manhattan’s Upper East Side, sending shockwaves through the city and leaving residents in a state of panic.

According to early reports, more than 100 firefighters and first responders rushed to the scene as thick smoke filled the sky. The blast was strong enough to shatter nearby windows and set off car alarms for blocks.Witnesses describe hearing a deafening “boom” followed by chaos in the streets, with people running and emergency sirens blaring. “It felt like the whole building shook,” one resident said.

Authorities have yet to confirm the exact cause of the explosion. Investigations are underway, and officials have urged residents to avoid the area.

This is a developing story. Check back for updates as we bring you the latest from the scene.