Sir Salman Rushdie’s suspected attacker has denied attempted murder and assault in a court in New York state.
Hadi Matar, 24, was identified by New York police after the attack on Friday.
Police have not established a motive for the stabbing that left the author, 75, seriously injured.
He remains on a ventilator in hospital.
This is what we know of the suspect so far:
Born in the US
Matar is from Fairview, New Jersey, and had bought a pass to the event at the Chautauqua Institution.
Spectator Kathleen Jones said the attacker was dressed in black, with a black mask.
Matar was born in the United States to Lebanese parents who emigrated from Yaroun, a border village in southern Lebanon, Mayor Ali Tehfe told the AP news agency.
He is believed to have been born about a decade after the publication of The Satanic Verses, the book that drew Sir Salman death threats, in 1988.
According to NBC, he was born in California, but had recently moved to New Jersey.
Sources said that Matar also had a fake New Jersey driver’s licence on him.
Police and the FBI have cordoned off the area around Matar’s home.
‘Extremist sympathies’ probed
The authorities are unsure if Matar had a criminal record, New York State Police Maj Eugene J Staniszewski said.
A backpack believed to have been left by the suspect was rendered safe by sheriff’s bomb squad members, and state troopers have requested a search warrant to look inside, Maj Staniszewski said.
According to NBC News, which cited a law enforcement official with direct knowledge of the investigation, a preliminary review of Matar’ social media shows he had sympathies for Shia extremism and Iran’s Islamic Revolutionary Guard Corps (IRGC).
The IRGC has been labelled a terrorist organisation by the US.
Authorities are looking into those alleged sympathies. However, there are no definitive links between Matar and the IRGC, the law enforcement source told NBC.
The Iran-backed Lebanese armed group Hezbollah has said it had no information on the stabbing and would not comment on it.
Mobile phone checked
A mobile phone messaging app belonging to Matar includes images of Qassem Soleimani, the commander of the IRGC killed in a US drone strike in January 2020.
The phone also reportedly includes an image of an Iraqi extremist sympathetic to the Iranian regime.
Matar’s lawyer, Nathaniel Barone, said he was still gathering information and declined to comment.