US President Donald Trump announced Friday that he is banning CNN, MS NOW and Politico from the White House, saying the outlets’ coverage of his administration amounted to “FICTION and LIES.”

Trump made the announcement in a post on his Truth Social platform, declaring the ban “effective immediately” and warning that other news organizations could face similar restrictions. As of Saturday morning, all three agencies have had their credentials revoked.

CNN condemned the announcement of the ban, stating: “We have a right under the US Constitution to do our reporting without hindrance or interference from the government and this ban is an illegal assault on this fundamental right.”

Trump did not specify what conduct prompted the announcement or how the ban would be carried out. Speaking to reporters in the Oval Office later on Friday, he offered few details on how to implement the ban, only saying that it was “fake news” and “cumulative stories” that led to the ban. He also named the New York Times and Washington Post as targets of his criticism, suggesting they could face similar treatment.

Bruce D. Brown, president of the Reporters Committee for Freedom of the Press, said the move amounts to “textbook viewpoint discrimination” that courts would likely strike down if challenged. All three news outlets pledged to vigorously defend their First Amendment right under the U.S. Constitution, which safeguards press freedom.

This development follows a series of earlier disputes between the Trump administration and the press corps over access to the White House and other federal facilities. The administration barred an Associated Press reporter from the Oval Office and Air Force One last year after the news outlet declined to adopt the administration’s preferred name for the Gulf of Mexico, a dispute that remains the subject of ongoing litigation.

In 2018, during Trump’s first term, the White House revoked the press credentials of then-CNN correspondent Jim Acosta, a decision a federal judge ordered to be reversed. Courts have previously relied on the 1977 D.C. Circuit decision in Sherrill v. Knight, which held that once the White House opens press facilities to credentialed journalists, it cannot deny access on an arbitrary basis.

The White House Correspondents’ Association and the affected outlets have condemned the ban, with some signaling possible legal action. No further developments had been reported as of Saturday.