Reporters and photographers from the organizations said their White House press credentials were confiscated or deactivated when they attempted to enter the complex Saturday morning.

CNN senior White House reporter Betsy Klein said Secret Service personnel informed her that her credential had been deactivated. CNN later confirmed that members of its team had been denied entry and said it would continue covering the administration despite the restriction.

Journalists from MS NOW were also turned away. White House correspondent Akayla Gardner said she was informed that her badge had been disabled when she attempted to enter the grounds. Politico also confirmed that its White House reporter Cheyenne Haslett was denied access.

Trump announced the ban Friday in a social media post, accusing the three organizations of publishing false information about him and his administration. He did not cite specific reports in the post and indicated that restrictions on additional news organizations could follow.

The affected news organizations criticized the decision and raised First Amendment concerns.

CNN said it has a constitutional right to report on the federal government without improper government interference and described the ban as unlawful. MS NOW said it intended to take steps to defend its First Amendment rights and the role of independent journalism. Politico also said it would defend its journalists and continue covering the White House.

The White House Correspondents’ Association called on the administration to immediately restore access, warning that excluding news organizations because of their coverage could establish a precedent affecting other outlets.

The dispute is the latest confrontation between the Trump administration and news organizations over access to government institutions and raises new legal questions over the government’s authority to restrict journalists’ White House credentials based on their reporting.