U.S. outlets CNN and MS NOW reported that the government denied them access to the White House on Saturday, one day after Donald Trump announced the measure against them for broadcasting what he calls "fake news."

Both outlets denounced the measure as a violation of the U.S. Constitution and promised to continue reporting on the government.

Both are expected to take the bans to court to regain access to the presidential residence.

"The White House belongs to the American people and the decisions made inside are funded with our taxes," MS NOW, formerly MSNBC, said on X.

"We have a right, protected by the U.S. Constitution, to do our journalistic work without obstacles or interference from the government, and this ban is an illegal attack against this fundamental right," CNN said.

There was no immediate information from Politico, another affected outlet.

When contacted, the White House referred AFP to Trump's statements on Friday, in which he announced the bans.

The 80-year-old Republican — who has long maintained an incendiary relationship with the mainstream media — warned that other outlets could suffer the same fate, although he did not specify which ones.

"I am proud to announce that, effective immediately, I am banning Fake News CNN, MSNOW… and Politico… from White House access as a result of their constant 'coverage' of FAKE NEWS," Trump said on his Truth Social platform.

The Republican added that "the media should not be able to constantly write or report FICTIONS and LIES when covering the President of the United States."

Trump constantly lashes out at media whose coverage he dislikes. He has filed multiple defamation lawsuits against news outlets, attacked the press on Truth Social and verbally assaulted several reporters — especially women — among them CNN anchor Kaitlan Collins.