Salman Rushdie is on the "road to recovery," his agent said Sunday, two days after a shocking assault at a literary event left the British author hospitalized on a ventilator with multiple stab wounds.

"He's off the ventilator, so the road to recovery has begun," Andrew Wylie said in a statement sent to multiple media outlets.

"It will be long; the injuries are severe, but his condition is headed in the right direction," Wylie said.

The agent said earlier that Rushdie might lose an eye; he also suffered injuries to the abdomen.

The author's son said Sunday the family was "extremely relieved" that Rushdie is off the ventilator and has been able to "say a few words."

"Though his life-changing injuries are severe, his usual feisty and defiant sense of humour remains intact," Zafar Rushdie said in a statement.

The author, who spent years under police protection after Iranian leaders called for his killing over his portrayal of Islam and the Prophet Mohammed in his novel "The Satanic Verses," was about to address a literary festival Friday in western New York state when a man rushed the stage and stabbed him repeatedly in the neck and abdomen.

The suspected assailant, Hadi Matar, 24, was wrestled to the ground by staff and other audience members before being taken into police custody.

He was arraigned in court on Saturday and pleaded not guilty to attempted murder charges.

Police and prosecutors have provided scant information about Matar's background or the possible motivation behind his attack.

Matar's family appears to come from the village of Yaroun in southern Lebanon, though he was born in the United States, according to a Lebanese official.

An AFP reporter who visited the village Saturday was told that Matar's parents were divorced and his father -- a shepherd -- still lived there.

Journalists who approached his father's home were turned away.

The 75-year-old Rushdie had been living under an effective death sentence since 1989, when Iran's then-supreme leader, the Ayatollah Ruhollah Khomeini, issued a religious decree, or fatwa, ordering Muslims to kill the writer.

The fatwa followed the publication of Rushdie's novel "The Satanic Verses," which enraged some Muslims who said it was blasphemous.

In a recent interview with Germany's Stern magazine, Rushdie had spoken of how, after so many years living with death threats, his life was "getting back to normal."

"For whatever it was, eight or nine years, it was quite serious," he told a Stern correspondent in New York.

"But ever since I've been living in America, since the year 2000, really there hasn't been a problem in all that time."

After his move to New York, Rushdie became a US citizen in 2016. Despite the continued threat to his life, he was increasingly seen in public -- often without noticeable security.

Security was not particularly tight at Friday's event at the Chautauqua Institution, which hosts arts programs in a tranquil lakeside community near the city of Buffalo.

The stabbing triggered international outrage from politicians, literary figures and ordinary people.

US President Joe Biden on Saturday called it a "vicious" attack and praised Rushdie for "his refusal to be intimidated or silenced." British leader Boris Johnson said he was "appalled."

But the attack also drew applause from Islamist hardliners in Iran and Pakistan.

Matar is being held without bail and has been formally charged with second-degree attempted murder and assault with a weapon.