Note about ISIS found in truck used in NYC terrorist attack, sources say

Police have found a note inside the truck that was used Tuesday to run down people on a bike path in lower Manhattan that indicates the suspect claimed to have carried out the attack for the Islamic State terrorist group, law enforcement sources said.

Eight people were killed and 11 others were seriously injured when Sayfullo Habibullaevic Saipov, 29, a native of Uzbekistan who came to the United States in 2010, allegedly drove onto a bike path near the West Side Highway on Tuesday afternoon, officials said.

Saipov allegedly crashed the truck into a school bus, got out with two imitation firearms and shouted "Allahu Akbar," Arabic for "God is Great" before he was shot and wounded by police, authorities said.

The note inside the truck translates to "ISIS Lives Forever," according to a senior official briefed on the investigation. At least one knife was found in the truck, the official said.

RELATED: Photos from the scene of the deadly attack

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Truck plows through New York City bike path in terror attack
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Truck plows through New York City bike path in terror attack
Police investigate a vehicle allegedly used in a ramming incident on the West Side Highway in Manhattan, New York, U.S., October 31, 2017. REUTERS/Andrew Kelly
NEW YORK, NY - OCTOBER 31: Parents pick up their children from Public School 89 near the scene where a truck plowed through a bike path in lower Manhattan on October 31, 2017 in New York City. Officials are reporting up to 8 dead and 15 people have been injured. (Photo by Carolyn Cole/Los Angeles Times via Getty Images)
All media responding to the incident in Lower Manhattan are asked to meet DCPI reps at Chambers Street and Greenwich Street.

Photo: Martin Speechley/Office of the Deputy Commissioner Public Information (DCPI)
NEW YORK, NY - OCTOBER 31: Emergency personal 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)
NEW YORK, NY - OCTOBER 31: Police gather at the scene after reports of multiple people injured after a truck plowed through a bike path in lower Manhattan on October 31, 2017 in New York City. Officials are reporting up to 6 dead and 11 people have been injured. (Photo by Andy Kiss/Getty Images)
NYPD investigators are at the crime scene near a bike path in lower Manhattan in New York, NY, U.S., October 31, 2017. REUTERS/Brendan McDermid
A police dog checks out vehicles along the street after a shooting incident in New York City, U.S. October 31, 2017. REUTERS/Shannon Stapleton
Police block off the street after a shooting incident in New York City, U.S. October 31, 2017. REUTERS/Shannon Stapleton
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)
Parents pick up their children from a local school after a shooting incident in New York City, U.S. October 31, 2017. REUTERS/Shannon Stapleton
A NYPD officer stands guard at a crime scene near a bike path where a body is covered with a white-sheet in lower Manhattan in New York, NY, U.S., October 31, 2017. REUTERS/Brendan McDermid
NEW YORK, NY - OCTOBER 31: 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 October 31, 2017 in New York City. Officials are reporting up to 6 dead and 11 people have been injured. (Photo by Andy Kiss/Getty Images)
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)
NEW YORK, NY - OCTOBER 31: 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 October 31, 2017 in New York City. Officials are reporting up to 8 dead and at least 15 people have been injured. (Photo by Kena Betancur/Getty Images)
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)
Police investigate a vehicle allegedly used in a ramming incident on the West Side Highway in Manhattan, New York, U.S., October 31, 2017. REUTERS/Andrew Kelly
A Home Depot truck which struck down multiple people on a bike path, killing several and injuring numerous others is seen as New York city first responders are at the crime scene in lower Manhattan in New York, NY, U.S., October 31, 2017. REUTERS/Brendan McDermid
Parents pick up their children from P.S./I.S.-89 school after a shooting incident in New York City, U.S. October 31, 2017. REUTERS/Shannon Stapleton
Parents pick up their children from P.S./I.S.-89 school after a shooting incident in New York City, U.S. October 31, 2017. REUTERS/Shannon Stapleton
Parents pick up their children from P.S./I.S.-89 school after a shooting incident in New York City, U.S. October 31, 2017. REUTERS/Shannon Stapleton
NEW YORK, NY - OCTOBER 31: 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 October 31, 2017 in New York City. Officials are reporting up to 8 dead and at least 15 people have been injured. (Photo by Kena Betancur/Getty Images)
NEW YORK, NY - OCTOBER 31: 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 October 31, 2017 in New York City. Officials are reporting up to 8 dead and at least 15 people have been injured. (Photo by Kena Betancur/Getty Images)
NEW YORK, NY - OCTOBER 31: 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 October 31, 2017 in New York City. Officials are reporting up to 8 dead and at least 15 people have been injured. (Photo by Kena Betancur/Getty Images)
NEW YORK, NY - OCTOBER 31: Parents pick up their children from school near the scene where a truck plowed through a bike path in lower Manhattan on October 31, 2017 in New York City. Officials are reporting up to 8 dead and 15 people have been injured. (Photo by Kena Betancur/Getty Images)
NEW YORK, NY - OCTOBER 31: 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 October 31, 2017 in New York City. Officials are reporting up to 8 dead and at least 15 people have been injured. (Photo by Kena Betancur/Getty Images)
Law enforcement officers secure an area following an incident in New York on October 31, 2017. A pickup driver killed eight people in New York on Tuesday, mowing down cyclists and pedestrians, before striking a school bus in what officials branded a 'cowardly act of terror.' Eleven others were seriously injured in the broad daylight assault and first deadly terror-related attack in America's financial and entertainment capital since the September 11, 2001 Al-Qaeda hijackings brought down the Twin Towers. / AFP PHOTO / Don EMMERT (Photo credit should read DON EMMERT/AFP/Getty Images)
An investigator walks past a crashed pickup truck following an incident in New York on October 31, 2017. A pickup driver killed eight people in New York on Tuesday, mowing down cyclists and pedestrians, before striking a school bus in what officials branded a 'cowardly act of terror.' Eleven others were seriously injured in the broad daylight assault and first deadly terror-related attack in America's financial and entertainment capital since the September 11, 2001 Al-Qaeda hijackings brought down the Twin Towers. / AFP PHOTO / Don EMMERT (Photo credit should read DON EMMERT/AFP/Getty Images)
New York City Police Department (NYPD) officers on Chambers Street surround the rented Home Depot Inc. pick up truck used in a motorist attack on the West Side of Manhattan in New York, U.S., on Tuesday, Oct. 31, 2017. A man in a rented pickup truck drove onto a busy bicycle path near the World Trade Center memorial and mowed down people Tuesday, killing at least eight and injuring several others. Photographer: Tim Fadek/Bloomberg via Getty Images
NEW YORK, NY - OCTOBER 31: 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 October 31, 2017 in New York City. Officials are reporting up to 8 dead and at least 15 people have been injured. (Photo by Kena Betancur/Getty Images)
NEW YORK, NY - OCTOBER 31: Parents pick up their children from Public School 89 near the scene where a truck plowed through a bike path in lower Manhattan on October 31, 2017 in New York City. Officials are reporting up to 8 dead and 15 people have been injured. (Photo by Carolyn Cole/Los Angeles Times via Getty Images)
NEW YORK, NY - OCTOBER 31: Police surround the area where a truck plowed through a bike path in lower Manhattan on October 31, 2017 in New York City. Officials are reporting up to 6 dead and 15 people have been injured.(Photo by Carolyn Cole/Los Angeles Times via Getty Images)
Authorities walk just outside the perimeter of the crime scene 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)
NEW YORK, NY - OCTOBER 31: Parents pick up their children from Public School 89 near the scene where a truck plowed through a bike path in lower Manhattan on October 31, 2017 in New York City. Officials are reporting up to 8 dead and 15 people have been injured. (Photo by Carolyn Cole/Los Angeles Times via Getty Images)
NEW YORK, USA - OCTOBER 31 : Security forces cordon off the area after a man reportedly drove a pick up truck along a bike lane near the West Side Highway in New York City on October 31, 2017. Eight people were reportedly killed in the incident, at least 12 were injured. (Photo by Mohammed Elshamy/Anadolu Agency/Getty Images)
NEW YORK, NY - OCTOBER 31: 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 October 31, 2017 in New York City. Officials are reporting up to 8 dead and at least 15 people have been injured. (Photo by Kena Betancur/Getty Images)
NEW YORK, NY - OCTOBER 31: SWAT members check for explosives under a car one block from the scene where a truck plowed through a bike path in lower Manhattan on October 31, 2017 in New York City. Officials are reporting up to 6 dead and 15 people have been injured.(Photo by Carolyn Cole/Los Angeles Times via Getty Images)
NEW YORK, NY - OCTOBER 31: Parents pick up their children from Public School 89 near the scene where a truck plowed through a bike path in lower Manhattan on October 31, 2017 in New York City. Officials are reporting up to 8 dead and 15 people have been injured. (Photo by Carolyn Cole/Los Angeles Times via Getty Images)
NEW YORK, USA - OCTOBER 31 : Security forces cordon off the area after a man reportedly drove a pick up truck along a bike lane near the West Side Highway in New York City on October 31, 2017. Eight people were reportedly killed in the incident, at least 12 were injured. (Photo by Mohammed Elshamy/Anadolu Agency/Getty Images)
NEW YORK, NY - OCTOBER 31: 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 October 31, 2017 in New York City. Officials are reporting up to 8 dead and at least 15 people have been injured. (Photo by Kena Betancur/Getty Images)
NEW YORK, USA - OCTOBER 31 : Security forces cordon off the area after a man reportedly drove a pick up truck along a bike lane near the West Side Highway in New York City on October 31, 2017. Eight people were reportedly killed in the incident, at least 12 were injured. (Photo by Mohammed Elshamy/Anadolu Agency/Getty Images)
New York Fire Department (NYFD) and New York Police Department (NYPD) vehicles sit parked on a blocked off street after a motorist attack on the West Side of Manhattan in New York, U.S., on Tuesday, Oct. 31, 2017. A man in a rented pickup truck drove onto a busy bicycle path near the World Trade Center memorial and mowed down people Tuesday, killing at least eight and injuring several others. Photographer: Tim Fadek/Bloomberg via Getty Images
A young girl reacts as police officers secure an area following a shooting incident in New York on October 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 & was shot by NYPD.' / AFP PHOTO / Don EMMERT (Photo credit should read DON EMMERT/AFP/Getty Images)
NEW YORK, USA - OCTOBER 31 : Security forces cordon off the area after a man reportedly drove a pick up truck along a bike lane near the West Side Highway in New York City on October 31, 2017. Eight people were reportedly killed in the incident, at least 12 were injured. (Photo by Mohammed Elshamy/Anadolu Agency/Getty Images)
Police officers 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)
NEW YORK, NY - OCTOBER 31: Emergency personal respond to reports of possible shooting in Lower Manhattan on October 31, 2017 in New York City. According to reports up to eight people may have been killed. (Photo by Kena Betancur/Getty Images)
A bicycles lies inside the roped off crime scene 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)
Police investigate a vehicle allegedly used in a ramming incident on the West Side Highway in Manhattan, New York, U.S., October 31, 2017. REUTERS/Andrew Kelly
Police officers secure an area following a shooting incident in New York on October 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 & was shot by NYPD.' / AFP PHOTO / Don EMMERT (Photo credit should read DON EMMERT/AFP/Getty Images)
Police officers arrive at the scene following a shooting incident in New York on October 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. / AFP PHOTO / Don EMMERT (Photo credit should read DON EMMERT/AFP/Getty Images)
People watch as police officers secure an area following a shooting incident in New York on October 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 & was shot by NYPD.' / AFP PHOTO / Don EMMERT (Photo credit should read DON EMMERT/AFP/Getty Images)
A pickup truck used in an attack sits on the intersection of West and Chambers Street in Manhattan, New York, U.S., October 31 2017. REUTERS/Andrew Kelly
NEW YORK - OCTOBER 31: Media gathers at West St. and Murray St. after a man driving a rental truck struck and killed eight people on a jogging and bike path in Lower Manhattan on October 31, 2017 in New York City. Officials are reporting up to 8 dead and at least 15 people have been injured. (Photo by Yana Paskova/Getty Images)
NEW YORK - OCTOBER 31: Police gather at Greenwich St. and Murray St. after a man driving a rental truck struck and killed eight people on a jogging and bike path in Lower Manhattan on October 31, 2017 in New York City. Officials are reporting up to 8 dead and at least 15 people have been injured. (Photo by Yana Paskova/Getty Images)
Parents pick up their children from P.S./I.S.-89 school after a shooting incident in New York City, U.S. October 31, 2017. REUTERS/Shannon Stapleton
Parents pick up their children from P.S./I.S.-89 school after a shooting incident in New York City, U.S. October 31, 2017. REUTERS/Shannon Stapleton
Parents pick up their children from P.S./I.S.-89 school after a shooting incident in New York City, U.S. October 31, 2017. REUTERS/Shannon Stapleton
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Saipov, who read ISIS propaganda online, has been questioned by authorities at the hospital and showed no remorse and was boasting about the attack, the official said.

Saipov entered the U.S. through a diversity visa lottery program, two senior U.S. officials with direct knowledge said.

Related: Trump Blames Schumer for Letting Suspect in Via 'Diversity Lottery'

Saipov used to live in Florida, and Kobiljon Matkarov, a fellow Uzbek national who knew him there, said there was no indication that he would carry out such an attack. Matkarov said he last saw Saipov five or six months ago when Matkarov was in New York.

"He was very happy guy. He liked the US. He is no terrorist. He's all the time happy, smiling all the time," Matkarov said in a phone interview.

Law enforcement sources said Saipov rented the truck from a Home Depot in Passaic, New Jersey, at around 2 p.m. and drove to Manhattan. The truck was driven onto the West Side Highway bike path at around 3:05 p.m., police said.

Related: 20 Blocks of Terror: How the NYC Attack Unfolded

Public records show that Saipov has a commercial truck license. He was issued traffic citations in Maryland in 2011, in Pennsylvania in 2012 and 2015 and in Missouri in 2016, where records showed he was driving a tractor-trailer.

In all but one of the cases, in which the citation was withdrawn, Saipov pleaded guilty and paid a fine, according to records. He was issued a Class A commercial truck license in 2010, apparently originally in New Jersey and then in Florida.

Matkarov said he believed Saipov was recently living in New Jersey and was driving for Uber. Uber confirmed he had been a driver and passed a background check.

"We are horrified by this senseless act of violence. Our hearts are with the victims and their families. We have reached out to law enforcement to provide our full assistance," and Uber spokesperson said.

The rampage was being treated as a case of terrorism, but authorities in New York said it didn't appear to be part of any larger plot. New York Gov. Andrew Cuomo said it appeared to have been carried out by a lone actor.

After initial reports of the incident, President Donald Trump said on Twitter that it "looks like another attack by a very sick and deranged person" and "NOT IN THE U.S.A.!"

The president also Tweeted on Tuesday afternoon: "We must not allow ISIS to return, or enter, our country after defeating them in the Middle East and elsewhere. Enough!"

Related: New York Officials, Residents Say They Won't Be Intimidated by Terror

A U.S. counterterrorism official said Tuesday afternoon that the intelligence community was unaware of any claim of responsibility from any group at that time.

The FBI was seen at a home in Tampa, Florida, listed as being associated with Saipov, according to NBC affiliate WFLA.

Florida Gov. Rick Scott said in a statement: "I am absolutely disgusted by the act of terror that occurred in Manhattan today. All of Florida is praying for the victims, their families and our brave law enforcement and first responders."

Uzbekistan isn't on the list of countries covered under Trump's travel restrictions.

The attack follows other attacks in which vehicles were driven into crowds in other countries, like attacks in Nice, France, and Berlin in 2016.

A man arrested in a truck attack in Stockholm, Sweden, that killed 15 people this year was from Uzbekistan. The State Department has warned Americans traveling to the country that supporters of some Islamic terrorist groups, including al-Qaeda and the Islamic State, are in Central Asia.

In 2015 a citizen of Uzbekistan who had been living in Brooklyn, Abdurasul Juraboev, pleaded guilty to conspiring to provide material support to the Islamic State, according to the Justice Department. He was sentenced in October to 15 years in prison, the department said.

Prosecutors said Juraboev planned to travel to Syria and also bombing Coney Island. Another man who is a citizen of Kazakhstan was also arrested and pleaded guilty to planning to travel to Syria, according to the Justice Department.

Bekhzod Abdusamatov, 22, of Cincinnati, told NBC News in a telephone interview that his parents took in Saipov for a time after he came to the United States in 2010, and the family was surprised that Saipov apparently registered a business in Ohio using his family’s address. He said his father is friends with the suspect’s grandfather from Uzbekistan.

Abdusamatov said that he remembered Saipov as polite, that there was nothing unusual about him and that he spent much of his time outside the house.

When he found out that Saipov was accused in Tuesday’s attack, Abdusamatov said: "I was shocked. I never would’ve imagined something like this. I never would've thought this guy would do something violent."

CORRECTION (Nov. 1, 7:30 a.m.): An earlier version of this article misstated the state where Sayfullo Saipov received a traffic citation in 2012. It was Pennsylvania, not Maryland.

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