(CNN)The suspect in New York's deadliest terror attack since 9/11 has been charged with federal terrorism offenses in Tuesday's attack that left eight people dead, authorities said.
Sayfullo Habibullaevic Saipov, a 29-year-old Uzbekistan native who was living in New Jersey, is charged with providing material support to ISIS, dviolence and destruction of motor vehicles, said Joon H. Kim, the acting US Attorney for the Southern District of New York .
Saipov appeared in federal court in a wheelchair and didn't enter a plea, a source at the US Attorney's Office told CNN.
President Donald Trump said he should be executed.
"NYC terrorist was happy as he asked to hang ISIS flag in his hospital room. He killed 8 people, badly injured 12. SHOULD GET DEATH PENALTY!' the President tweeted late Wednesday night.
Saipov told investigators he was inspired by Islamic State videos, in particular one showing ISIS leader Abu Bakr al-Baghdadi, a federal criminal complaint states.
The suspect decided to conduct a truck attack "to inflict maximum damage against civilians" and that he specifically chose to strike on Halloween "because he believed there would be more civilians on the street for the holiday," the complaint says.
He began planning an attack a year ago and decided two months ago to use a truck, officials said.
One of Saipov's cellphones reviewed by law enforcement contained approximately 90 videos, "many of which appear to be ... ISIS-related propaganda." The phone also had almost 4,000 images, many of which were ISIS propaganda, the FBI said in the complaint.
Photos: Manhattan truck attack
New York City police work in Manhattan after a rental truck drove down a busy bicycle path and struck people on Tuesday, October 31. At least eight people were killed in the incident, which is being investigated as terrorism, according to multiple law enforcement sources. A suspect is in custody.
Source: cnn.com
