By Larry Celona, Tom Wilson and Shawn Cohen
September 17, 2016 | 9:18pm | Updated
A “deafening’’ explosion rocked Chelsea Saturday night, injuring 29 people, blowing out scores of windows and forcing the evacuation of at least two buildings.
The blast went off in a 4-by-4-by-3-foot construction Dumpster outside the Townhouse Inn of Chelsea at 131 W. 23d St.
Mayor de Blasio called the explosion an “intentional act,’’ but not believed to be connected to terrorism.
But tensions only rose when, three hours after the blast, a second device was found four blocks away — a pressure cooker that an early investigation found was likely also a bomb.
“The bomb squad believes it’s real,” a police source with knowledge of the investigation told The Post of that second device, found at 27th Street between Sixth and Seventh avenues. The cooker was safely removed from the scene by NYPD.