Saipov was formally accused on Wednesday of killing at least eight people on Tuesday, when he allegedly rammed a rented Home Depot truck into people on a bike path in lower Manhattan in New York City.

According to Reuters, the terrorist suspect verbally waived his "Miranda" rights while at Bellevue Hospital, where he was taken for treatment after being shot in the abdomen and apprehended by police Tuesday.

Saipov told law enforcement that Islamic State videos he watched on his cell phone inspired him to attack, US officials told Reuters.

US officials said that Saipov chose to attack on Tuesday, because it was Halloween, and he expected more people to be out in public, Reuters reported.

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