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Investigators inspect a truck following a shooting incident in New York on Oct. 31, 2017.

Bicycles and debris lie on a bike path after a motorist drove onto the path near the World Trade Center memorial, striking and killing several people Tuesday, Oct. 31, 2017.

Authorities respond near a damaged school bus Tuesday, Oct. 31, 2017, in New York. A motorist drove onto a busy bicycle path near the World Trade Center memorial and struck several people on Tuesday police and witnesses said.

A young girl reacts as police officers block an area following a shooting incident in New York on Oct. 31, 2017. Several people were killed and numerous others injured in New York on Tuesday after a vehicle plowed into a pedestrian and bike path in Lower Manhattan, police said. "The vehicle struck multiple people on the path," police tweeted. "The vehicle continued south striking another vehicle. The suspect exited the vehicle displaying imitation firearms and was shot by NYPD."

Emergency personal respond to reports of possible shooting in Lower Manhattan on Oct. 31, 2017 in New York City. According to reports up to eight people may have been killed.

Scene of a a deadly incident along a bike path near Stuyvesant High School, Tuesday Oct. 31, 2017, in New York.

Authorities investigate the scene near a covered body on a bike path after a motorist drove onto the path near the World Trade Center memorial, striking and killing several people, Tuesday, Oct. 31, 2017, in New York.

Police officers arrive at the scene following a shooting incident in New York on Oct. 31, 2017. Multiple people were hurt in downtown Manhattan, US media reported after police confirmed that they were responding to reports of a shooting. Police said they had mobilized to the scene in Lower Manhattan and that one person was in custody, giving no further details.

Emergency personal respond after reports of multiple people hit by a truck after it plowed through a bike path in lower Manhattan on Oct. 31, 2017 in New York City. According to reports up to six people may have been killed.

In this still image taken from video, emergency personnel respond to victims after a motorist drove onto a busy bicycle path near the World Trade Center memorial and struck several people Tuesday, Oct. 31, 2017 in New York.

Emergency personnel carry a man into an ambulance after a motorist drove onto a busy bicycle path near the World Trade Center memorial and struck several people Tuesday, Oct. 31, 2017, in New York.

Police officers inspect a truck following a shooting incident in New York on October 31, 2017.

People watch as police officers secure an area following a shooting incident in New York on Oct. 31, 2017. Several people were killed and numerous others injured in New York on Tuesday after a vehicle plowed into a pedestrian and bike path in Lower Manhattan, police said. "The vehicle struck multiple people on the path," police tweeted. "The vehicle continued south striking another vehicle. The suspect exited the vehicle displaying imitation firearms and was shot by NYPD."

Police direct people away from the scene after reports of multiple people injured after a truck plowed through a bike path in lower Manhattan on Oct. 31, 2017 in New York City.

Police gather at the scene after reports of multiple people injured after a truck plowed through a bike path in lower Manhattan on Oct. 31, 2017 in New York City. Officials are reporting up to 6 dead and 11 people have been injured.

Police secure an area following a shooting incident in New York on Oct. 31, 2017. Several people were killed and numerous others injured in New York on Tuesday after a vehicle plowed into a pedestrian and bike path in Lower Manhattan, police said. "The vehicle struck multiple people on the path," police tweeted. "The vehicle continued south striking another vehicle. The suspect exited the vehicle displaying imitation firearms and was shot by NYPD."

NYPD officers respond after reports of multiple people hit by a truck after it plowed through a bike path in lower Manhattan on Oct. 31, 2017 in New York City. According to reports up to six people may have been killed.

NYPD officers respond after reports of multiple people hit by a truck after it plowed through a bike path in lower Manhattan on Oct. 31, 2017 in New York City. According to reports up to six people may have been killed.

People gather as NYPD officers respond after reports of multiple people hit by a truck after it plowed through a bike path in lower Manhattan on Oct. 31, 2017 in New York City. According to reports up to six people may have been killed.

NYPD officers respond after reports of multiple people hit by a truck after it plowed through a bike path in lower Manhattan on Oct. 31, 2017 in New York City. According to reports up to six people may have been killed.

NYPD officers respond after reports of multiple people hit by a truck after it plowed through a bike path in lower Manhattan on Oct. 31, 2017 in New York City. According to reports up to six people may have been killed.

Bicycles and debris lay on a bike path after a motorist drove onto the path near the World Trade Center memorial, striking and killing several people Tuesday, Oct. 31, 2017.

Bicycles and debris lay on a bike path after a motorist drove onto the path near the World Trade Center memorial, striking and killing several people Tuesday, Oct. 31, 2017.

Firemen work in the scene after a motorist drove onto a busy bicycle path near the World Trade Center memorial and struck several people Tuesday, Oct. 31, 2017, in New York.

Children are evacuated from a school as emergency personal respond after a man driving a rental truck struck and killed eight people on a jogging and bike path in Lower Manhattan on Oct. 31, 2017 in New York City. Officials are reporting up to 8 dead and at least 15 people have been injured.

Families carry their children out of the scene after a motorist drove onto a busy bicycle path near the World Trade Center memorial and struck several people Tuesday, Oct. 31, 2017, in New York.

Authorities inspect the scene following a shooting incident in New York on October 31, 2017.

A NYPD Officer blocks a street as emergency personal respond after a man driving a rental truck struck and killed eight people on a jogging and bike path in Lower Manhattan on Oct. 31, 2017 in New York City. Officials are reporting up to 8 dead and at least 15 people have been injured.

This handout photograph obtained courtesy of the St. Charles County Police Department on Oct. 31, 2017 shows Saifullah Saipov, the suspectecd driver who killed eight people in New York on October 31, 2017, mowing down cyclists and pedestrians, before striking a school bus in what officials branded a "cowardly act of terror."

This image made from a video provided by Tawhid Kabir shows the suspect in a deadly attack being apprehended by police on Tuesday, Oct. 31, 2017, in New York. The man mowed down pedestrians and cyclists along a busy bike path near the World Trade Center memorial on Tuesday, before he was shot in the abdomen by police after jumping out of the truck, authorities said.

This image made from a video provided by Tawhid Kabir shows the suspect in a deadly attack running across the street with a fake gun in each hand on Tuesday, Oct. 31, 2017, in New York. The man mowed down pedestrians and cyclists along a busy bike path near the World Trade Center memorial on Tuesday, before he was shot in the abdomen by police after jumping out of the truck, authorities said.

This image made from a video provided by Tawhid Kabir shows the suspect in a deadly attack with a fake gun in each hand on Tuesday, Oct. 31, 2017, in New York. The man mowed down pedestrians and cyclists along a busy bike path near the World Trade Center memorial on Tuesday, before he was shot in the abdomen by police after jumping out of the truck, authorities said.