29 Hurt by 'Bomb' in NYC, called 'Act of Terrorism' - KWWL - Eastern Iowa Breaking News, Weather, Closings

29 Hurt by 'Bomb' in NYC, called 'Act of Terrorism'

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(NBC) -

An explosion that rocked a crowded Manhattan neighborhood Saturday night and injured 29 people has been determined to be an "intentional act," and Gov. Andrew Cuomo said it was clearly "an act of terrorism."

The explosion, on West 23rd Street between Sixth and Seventh Avenues in the Chelsea neighborhood, was reported at around 8:30 p.m. Twenty-nine people were hospitalized with injuries, but they had all been released by Sunday afternoon, authorities said.

"A bomb exploding in New York is obviously an act of terrorism," Cuomo said Sunday morning.

Less than three hours after the blast, an object police described as a "possible secondary device" was found just a few blocks away from the original explosion while officers were combing the area. Cuomo said the device was "similar in design" to the one that detonated just blocks away.

It was later sent to an NYPD range in the Bronx aboard a special containment vessel, the New York City Mayor Bill de Blasio's office said.

De Blasio said Saturday night that the blast had not been linked to terror, but Cuomo clarified that the explosion had not been linked to an international terror group. "A bomb going off is generically a terrorist activity," Cuomo said.

On Sunday afternoon, De Blasio and other city officials stressed that the investigation was in early stages and while investigators could determine the blast was "criminal" and "intentional," they hadn't nailed down a suspect or a motive.

No arrests have been made, but NYPD Commissioner James O'Neill said "New York City residents can rest assured that we'll get to the bottom of this."

Still, O'Neill, who was sworn in just a day before the blast, said the situation had him worried. "We did have a bomb detonated on 23rd street and we have no one apprehended so of course I'm concerned."

Security had already been tightened in the city for the ongoing United Nations General Assembly, but the presence of officers throughout New York City after the blast would be "bigger than ever," De Blasio said.

Cuomo ordered 1,000 New York State police and National Guardsmen across the city.

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