Surveillance video emerges of powerful blast that ripped through New York City street

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Authorities said there was no evidence of a "terror connection" Sunday morning as video emerged of the the blast that ripped through a busy New York City street Saturday night.

Closed circuit security cameras captured the blast from multiple angles. The explosion tore through a crowd on 23rd Street in Manhattan's Chelsea neighborhood.

At least 29 people were reported injured in the blast, with no life-threatening injuries reported.

Pedestrians can be seen running from the site of the explosion after a flash of light in the video footage that emerged Sunday.

A different angle that surfaced on Twitter late Saturday captured the blast from a distance, showing a flash of light and cloud of debris:

Officials have said they are examining surveillance video that appears to show a person near the blast site and attempting to determine if that person may be connected to the explosion.

Click through to see images of the explosion and aftermath

25 PHOTOS
Explosion in Manhattan and investigation
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Explosion in Manhattan and investigation
Fire fighters and other first responders stand near an alleged explosion on West 23rd Street on September 17, 2016, in New York. An explosion in New York's upscale and bustling Chelsea neighborhood injured at least 25 people, none of them in a life-threatening condition, late Saturday, the fire department said. / AFP / Bryan R. Smith (Photo credit should read BRYAN R. SMITH/AFP/Getty Images)
Members of the NYPD, FBI, ATF and other agencies invesitgate the the scene, following a late night explosion on West 23rd Street September, 18, 2016 in New York. An explosion rocked one of the most fashionable neighborhoods of New York on September 17 night, injuring 29 people, one seriously, a week after America's financial capital marked the 15th anniversary of the 9/11 attacks. Mayor Bill de Blasio indicated the blast was not accidental, even if there was no known link to terrorism. The blast occurred in Chelsea -- an area packed with bars, restaurants and luxury apartment blocks -- at a typically bustling time of the weekend. / AFP / Bryan R. Smith (Photo credit should read BRYAN R. SMITH/AFP/Getty Images)
Members of the NYPD, FBI, ATF and other agencies invesitgate the the scene, following a late night explosion on West 23rd Street September, 18, 2016 in New York. An explosion rocked one of the most fashionable neighborhoods of New York on September 17 night, injuring 29 people, one seriously, a week after America's financial capital marked the 15th anniversary of the 9/11 attacks. Mayor Bill de Blasio indicated the blast was not accidental, even if there was no known link to terrorism. The blast occurred in Chelsea -- an area packed with bars, restaurants and luxury apartment blocks -- at a typically bustling time of the weekend. / AFP / Bryan R. Smith (Photo credit should read BRYAN R. SMITH/AFP/Getty Images)
Evidence markers are seen on the street around officials from the New York City Police Department (NYPD) and Federal Bureau of Investigation (FBI) near the site of an explosion in the Chelsea neighborhood of Manhattan, New York, U.S. September 18, 2016. REUTERS/Rashid Umar Abbasi TPX IMAGES OF THE DAY
New York Governor Andrew Cuomo(R)visits the scene of an explosion on West 23rd Street September, 18, 2016 in New York. An explosion rocked one of the most fashionable neighborhoods of New York on September 17 night, injuring 29 people, one seriously, a week after America's financial capital marked the 15th anniversary of the 9/11 attacks. Mayor Bill de Blasio indicated the blast was not accidental, even if there was no known link to terrorism. The blast occurred in Chelsea -- an area packed with bars, restaurants and luxury apartment blocks -- at a typically bustling time of the weekend. / AFP / Bryan R. Smith (Photo credit should read BRYAN R. SMITH/AFP/Getty Images)
The Bureau of Alcohol, Tobacco, Firearms and Explosives (ATF) officers stand near the site of an explosion in the Chelsea neighborhood of Manhattan, New York, U.S. September 18, 2016. REUTERS/Stephanie Keith
Police block a road after an explosion in New York on September 17, 2016. An explosion in New York's Chelsea neighborhood injured multiple people Saturday night, police said. / AFP / William EDWARDS (Photo credit should read WILLIAM EDWARDS/AFP/Getty Images)
Explosion on 23rd and 6th. These two cars had back windows blown out while driving. 8 year old in back seat injured. https://t.co/aKDra2LaIC
Apartment is being blocked off - #Explosion #Chelsea #NewYork https://t.co/B14pWOFpZ0
#Explosion outside our apartment at 23rd and 6th in #newyork. Terrified. Hoping everyone is okay. https://t.co/i3q4cG7aWT
23rd and 6th Ave NYC explosion. Emergency responded within seconds https://t.co/3ZOYQJ2A5J
The situation at 23rd and 6th in NYC. Explosion happened on 23rd, subway station blocked off. https://t.co/NPNjXqIerH
Bomb squad just arrived... Block has been cordoned off between 6th and 7th on 23rd st. https://t.co/vnZ4TxciGj
Two woman look on as police block a road after an explosion in New York on September 17, 2016. An explosion in New York's Chelsea neighborhood injured multiple people Saturday night, police said. / AFP / William EDWARDS (Photo credit should read WILLIAM EDWARDS/AFP/Getty Images)
New York City firefighters stand near the site of an explosion in the Chelsea neighborhood of Manhattan, New York, U.S. September 17, 2016. REUTERS/Rashid Umar Abbasi
New York City firefighters stand near the site of an explosion in the Chelsea neighborhood of Manhattan, New York September 17, 2016. REUTERS/Rashid Umar Abbasi TPX IMAGES OF THE DAY
New York City police and firefighters stand near the site of an explosion in the Chelsea neighborhood of Manhattan, New York, U.S. September 17, 2016. REUTERS/Rashid Umar Abbasi
People look on as the police, fire department and other first responders work near an alleged explosion on West 23rd Street on September 17, 2016, in New York. An explosion in New York's upscale and bustling Chelsea neighborhood injured at least 25 people, none of them in a life-threatening condition, late Saturday, the fire department said. / AFP / Bryan R. Smith (Photo credit should read BRYAN R. SMITH/AFP/Getty Images)
Democratic nominee Hillary Clinton talks to reporters about the explosion in Chelsea neighborhood of Manhattan, New York, as she arrives to at the Westchester County airport in White Plains, U.S., September 17, 2016. REUTERS/Carlos Barria
NEW YORK, NY - SEPTEMBER 18: Security members take security measures at Grand Central Station after the explosion in Chelsea neighbourhood in Manhattan, New York, USA on September 18, 2016. (Photo by Bilgin S. Sasmaz/Anadolu Agency/Getty Images)
NEW YORK, NY - SEPTEMBER 18: Security members take security measures at site after the explosion in Chelsea neighbourhood in Manhattan, New York, USA on September 18, 2016. (Photo by Bilgin S. Sasmaz/Anadolu Agency/Getty Images)
Members of the NYPD, FBI, ATF and other agencies invesitgate the the scene, following a late night explosion on West 23rd Street September, 18, 2016 in New York. An explosion rocked one of the most fashionable neighborhoods of New York on September 17 night, injuring 29 people, one seriously, a week after America's financial capital marked the 15th anniversary of the 9/11 attacks. Mayor Bill de Blasio indicated the blast was not accidental, even if there was no known link to terrorism. The blast occurred in Chelsea -- an area packed with bars, restaurants and luxury apartment blocks -- at a typically bustling time of the weekend. / AFP / Bryan R. Smith (Photo credit should read BRYAN R. SMITH/AFP/Getty Images)
NEW YORK, NY - SEPTEMBER 18: A mangled dumpster sits on the sidewalk at the site of an explosion that occurred on Saturday night on September 18, 2016 in the Chelsea neighborhood of New York City. An explosion in a construction dumpster that injured 29 people is being labeled an 'intentional act'. A second device, a pressure cooker, was found four blocks away that an early investigation found was likely also a bomb. (Photo by Justin Lane-Pool/Getty Images)
NEW YORK, NY - SEPTEMBER 18: New York Governor Andrew Cuomo (R) and New York Mayor Bill de Blasio (L) talk to area residents while touring the site of an explosion that occurred on Saturday night on September 18, 2016 in the Chelsea neighborhood of New York City. An explosion in a construction dumpster that injured 29 people is being labeled an 'intentional act'. A second device, a pressure cooker, was found four blocks away that an early investigation found was likely also a bomb. (Photo by Justin Lane-Pool/Getty Images)
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See below for the latest updates from Reuters on the blast and investigation.

An explosion rocked the bustling Chelsea district of Manhattan on Saturday night, injuring at least 29 people in what authorities described as a deliberate, criminal act, while saying investigators had found no evidence of a "terror connection."

New York City Mayor Bill de Blasio and other city officials said investigators had ruled out a gas leak as the cause of the blast, but they stopped short of calling it a bombing and declined to specify precisely what they believed may have triggered the explosion.

Neha Jain, 24, who lives in the neighborhood, said she was sitting at home watching a movie when she heard a huge boom and everything shook.

SEE MORE: At least 29 people injured in explosion that shakes New York City

"Pictures on my wall fell, the window curtain came flying as if there was a big gush of wind," she told Reuters. "Then we could smell smoke. We went downstairs to see what happened, and firemen immediately told us to go back."

Police said a sweep of the neighborhood following the blast had turned up a possible "secondary device" four blocks away consisting of a pressure cooker with wires attached to it and connected to a cell phone.

Residents living nearby were advised to stay away from windows facing the street as a precaution, and the item was later safely moved to a police firing range for further examination, officer Christopher Pisano said.

As of Sunday morning, police were still seeking to determine whether the item was an explosive and had not detonated it, said New York police Lieutenant Thomas Antonetti.

Pressure cookers packed with explosives and detonated with timing devices were used by two Massachusetts brothers in the 2013 Boston Marathon bombing that killed three people and wounded more than 260.

The latest blast came less than a week after law enforcement agencies around the country were on heightened alert for the 15th anniversary of the Sept. 11, 2001, airline-hijacking attacks that killed nearly 3,000 Americans in New York, Washington and Pennsylvania.

SEE ALSO: Donald Trump and Hillary Clinton both refer to New York explosion as a bombing

Remaining circumspect about the exact nature of the explosion in Chelsea, De Blasio said early indications were that it was "an intentional act." He added that the site of the blast, outside on a major thoroughfare in the fashionable West Side Manhattan neighborhood, was being treated as a crime scene.

"There is no evidence at this point of a terror connection," the mayor said at a news conference about three hours after the blast. "There is no specific and credible threat against New York City at this point in time from any terror organization."

The mayor also said investigators did not believe there was any link to a pipe bomb that exploded earlier on Saturday in the New Jersey beach town of Seaside Park. No injuries were reported in that blast, from a device planted in a plastic trash can along the route of a charity foot race.

But a U.S. official said that a Joint Terrorism Task Force, an interagency group of federal, state and local officials, was called to investigate the Chelsea blast, suggesting authorities have not ruled out the possibility of a terror connection.

A joint task force also took the lead in investigating the New Jersey incident.

ONE PERSON SERIOUSLY INJURED

A law enforcement official told Reuters an initial investigation suggested the Chelsea explosion occurred in a dumpster. CNN cited law enforcement sources as saying they believed an improvised explosive device caused the blast.

President Barack Obama, attending a congressional dinner in Washington, "has been apprised of the explosion in New York City, the cause of which remains under investigation," a White House official said.

New York City Fire Commissioner Daniel Nigro said 29 people were hurt in the blast, and 24 of them had been taken to hospitals, including one he described as seriously injured. The rest suffered various cuts, scrapes and other minor injuries, Nigro said.

See more footage of the blast below

The explosion, described by one neighbor as "deafening," happened outside the Associated Blind Housing facility at 135 W. 23rd Street. The facility provides housing, training and other services for the blind.

Hundreds of people were seen fleeing down the block as police rushed to cordon off the area.

Tsi Tsi Mallett, who was driving along 23rd Street when the explosion took place, told Reuters the blast blew out her vehicle's rear window. Her 10-year-old son in the back seat was unhurt, she said.

"It was really loud, it hurt my eardrums," she said.

Even before the explosion, New York was tightening security for the start of this week's U.N. General Assembly session, which is expected to bring 135 world leaders and dozens of foreign government ministers to the city.

The explosion quickly became an issue in the presidential race, with Republican candidate Donald Trump remarking about the explosion when he appeared at a Colorado rally.

SEE ALSO: Possible secondary device found nearby

"Just before I got off the plane, a bomb went off in New York, and nobody knows exactly what's going on," Trump said a hours before New York officials spoke publicly about the blast.

"We better get very tough, folks."

Democratic rival Hillary Clinton made a statement on her campaign plane on the ground in New York, saying she had been briefed on "the bombings in New York and New Jersey." But she said she would wait until she had more information before commenting further.

(Reporting by AOL.com; Additional reporting by Simon Webb and David Ingram and by Frank McGurty and Angela Moon in New York, Alex Dobuzinksis in Los Angeles, Tim Ahmann and Mark Hosenball in Washington; Writing by Steve Gorman; Editing by Mary Milliken, Robert Birsel and Raissa Kasolowsky)

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