In Tuesday’s attack, Saipov hurtled down the bike path, running down cyclists and pedestrians, then crashed into a school bus, authorities said. He was shot in the abdomen after he jumped out of the vehicle brandishing air guns and yelling “God is great!” in Arabic, they said.

De Blasio called it “a cowardly act of terror.”

The dead consisted of five people from Argentina, one from Germany, and two Americans, authorities said. Nine people remained hospitalized in serious or critical condition, with injuries that included lost limbs and head, chest and neck wounds.

A roughly two-mile stretch of highway in lower Manhattan was shut down for the investigation. Authorities also converged on a New Jersey apartment building and a van in a parking lot at a New Jersey Home Depot.

President Donald Trump railed against the Islamic State on Twitter and declared “Enough!” and “NOT IN THE U.S.A.!”

On Wednesday, the president took a swipe at the Senate’s top Democrat, saying Saipov came to the U.S. under a visa lottery program — “a Chuck Schumer beauty.” Trump urged tougher immigration measures based on merit.

Schumer, who represents New York, said in a statement that he has always believed that immigration “is good for America.”

New Yorkers woke to a heavy police presence Wednesday outside the World Trade Center and at other locations around the city.

As ordered by New York Gov. Andrew Cuomo, the spire of One World Trade Center is illuminated in red, white and blue following a deadly rampage down a bike path not far from the building Tuesday, Oct. 31, 2017, in New York. A motorist in a rented Home Depot truck drove onto a bike path, striking and killing several people. (AP Photo/Craig Ruttle)
As ordered by New York Gov. Andrew Cuomo, the spire of One World Trade Center is illuminated in red, white and blue following a deadly rampage down a bike path not far from the building Tuesday, Oct. 31, 2017, in New York. A motorist in a rented Home Depot truck drove onto a bike path, striking and killing several people. (AP Photo/Craig Ruttle)

Runners and cyclists who use the popular bike path for their pre-dawn exercise were diverted away from the crime scene by officers stationed at barricades just north of where the rampage began.

Dave Hartie, 57, who works in finance, said he rides his bike along the path every morning.

“It’s great to be in the city and have that kind of peace,” he said. As for the attack, he said, “It’s the messed-up world we live in these days. Part of me is surprised it doesn’t happen more often.”

The slight, bearded Saipov is from heavily Muslim Uzbekistan and came to the U.S. legally in 2010, police said. He has a Florida driver’s license but was apparently living in New Jersey, they said.

Records show Saipov was a commercial truck driver who formed a pair of businesses in Ohio. He had also driven for Uber.

Mirrakhmat Muminov, 38, of Stow, Ohio, said he knew Saipov because they were both Uzbek truck drivers. He portrayed Saipov as an argumentative young man whose work was falling apart and who “was not happy with his life.”

A police officer stands near a vehicle, back, inside a perimeter in the parking lot of a Home Depot store, Tuesday, Oct. 31, 2017, in Passaic, N.J. Police investigating a rented Home Depot truck’s deadly rampage down a bike path near New York’s World Trade Center have surrounded the white Toyota minivan with Florida plates parked in the lot. (AP Photo/Julio Cortez)
A police officer stands near a vehicle, back, inside a perimeter in the parking lot of a Home Depot store, Tuesday, Oct. 31, 2017, in Passaic, N.J. Police investigating a rented Home Depot truck’s deadly rampage down a bike path near New York’s World Trade Center have surrounded the white Toyota minivan with Florida plates parked in the lot. (AP Photo/Julio Cortez)

Muminov said Saipov lost his insurance on his truck after his rates shot up because of a few traffic tickets, and companies stopped hiring him. Muminov said he heard from Saipov’s friends that Saipov’s truck engine blew up a few months ago in New Jersey.

Muminov said Saipov would get into arguments with his friends and family, tangling over even small things, such as going to a picnic with the Uzbek community.

“He had the habit of disagreeing with everybody. He was never part of the community. He was always alone, no respect for elders, no respect for community,” Muminov said.

He said he and Saipov would sometimes argue about politics and world affairs, including about Israel and Palestine. He said Saipov never spoke about ISIS, but he could tell he held radical views.

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Associated Press writers Sadie Gurman in Washington; Jake Pearson, Tom Hays, Adam Geller, Jennifer Peltz, Karen Matthews, Kiley Armstrong and Tom McElroy in New York; Shawn Marsh in Trenton, New Jersey; Michael Balsamo in Los Angeles; Jon Gambrell in Dubai, United Arab Emirates; and Michael R. Sisak in Philadelphia contributed to this report.