The Trump administration has revoked the visa for Wole Soyinka, the acclaimed Nigerian Nobel prize-winning writer who has been critical of Trump since his first presidency, Soyinka revealed on Tuesday.

“I want to assure the consulate … that I’m very content with the revocation of my visa,” Soyinka, who won the 1986 Nobel prize for literature, told a news conference.

Soyinka previously held permanent residency in the United States, though he destroyed his green card after Donald Trump’s first election in 2016.

Soyinka speculated that his recent comments comparing Trump to the Ugandan dictator Idi Amin might have struck a nerve and contributed to the US consulate’s decision.

Soyinka said earlier this year that the US consulate in Lagos had called him in for an interview to reassess his visa, which he said he would not attend.

According to a letter from the consulate addressed to Soyinka, seen by Agence France-Presse, officials have cancelled his visa, citing US state department regulations that allow “a consular officer, the secretary, or a department official to whom the secretary has delegated this authority … to revoke a nonimmigrant visa at any time, in his or her discretion”.

Reading the letter aloud to journalists in Lagos, Nigeria’s economic centre, he jokingly called it a “rather curious love letter from an embassy”, while telling any organisations hoping to invite him to the United States “not to waste their time”.

“I have no visa. I am banned,” Soyinka said.

The US embassy in Abuja, the capital, said it could not comment on individual cases, citing confidentiality rules.

The Trump administration has made visa revocations a hallmark of its wider crackdown on immigration, notably targeting university students who were outspoken about Palestinian rights.

Soyinka said he had recently compared Trump to Uganda’s Amin, something he said Trump “should be proud of”.

“Idi Amin was a man of international stature, a statesman, so when I called Donald Trump Idi Amin, I thought I was paying him a compliment,” Soyinka said. “He’s been behaving like a dictator.”

The 91-year-old playwright behind Death and the King’s Horseman has taught at and been awarded honours from top US universities including Harvard and Cornell.

His latest novel, Chronicles from the Land of the Happiest People on Earth, a satire about corruption in Nigeria, was published in 2021. Soyinka described the book as his “gift to Nigeria” in an interiview with the Guardian.

In February, the Crucible theatre in Sheffield staged Death and the King’s Horseman.

Soyinka left the door open to accepting an invitation to the United States should circumstances change, but added: “I wouldn’t take the initiative myself because there’s nothing I’m looking for there. Nothing.”

He went on to criticise the ramped-up arrests of undocumented immigrants in the country.

“This is not about me,” Soyinka said. “When we see people being picked off the street – people being hauled up and they disappear for a month … old women, children being separated. So that’s really what concerns me.”

Trump’s crackdown has seen national guard troops deployed to US cities and citizens temporarily detained as part of aggressive raids, as well as the curtailing of legal means of entry.