NEW YORK, NY - OCTOBER 31: NYPD officers respond after reports of multiple people hit by a truck after it plowed through a bike path in lower Manhattan on October 31, 2017 in New York City. According to reports up to six people may have been killed. (Photo by Kena Betancur/Getty Images)
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Witnesses: Driver yelled 'Allahu Akbar'
Sources tell CNN's Shimon Prokupecz that the FBI is investigating the incident that left at least six dead in New York as terrorism.
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New York truck incident 15 videos
NEW YORK, NY - OCTOBER 31: NYPD officers respond after reports of multiple people hit by a truck after it plowed through a bike path in lower Manhattan on October 31, 2017 in New York City. According to reports up to six people may have been killed. (Photo by Kena Betancur/Getty Images)
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Witnesses: Driver yelled 'Allahu Akbar'
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The Home Depot truck used in the bike path attack is removed from the crime scene, Wednesday, Nov. 1, 2017, in New York. (AP Photo/Mark Lennihan)
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NYPD: Attack suspect followed ISIS playbook
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Victims in New York attack identified
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A New York Police Department officer stands next to a body covered under a white sheet near a mangled bike along a bike path Tuesday Oct. 31, 2017, in New York. (AP Photo/Bebeto Matthews)
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Cuomo: Terror suspect radicalized domestically
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NEW YORK, NY - OCTOBER 31: NYPD officers respond after reports of multiple people hit by a truck after it plowed through a bike path in lower Manhattan on October 31, 2017 in New York City. According to reports up to six people may have been killed. (Photo by Kena Betancur/Getty Images)
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New York witness: Bodies had tire tracks
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Investigators inspect a truck following a shooting incident in New York on October 31, 2017. Several people were killed and numerous others injured in New York on Tuesday when a suspect plowed a vehicle into a bike and pedestrian path in Lower Manhattan, and struck another vehicle on Halloween, police said. A suspect exited the vehicle holding up fake guns, before being shot by police and taken into custody, officers said. The motive was not immediately apparent. / AFP PHOTO / Don EMMERT (Photo credit should read DON EMMERT/AFP/Getty Images)
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NYPD: Truck drove wrong way on bike path
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