Washington, Sept. 19 -- US President Donald Trump barred news platforms such as CNN, MS NOW and Politico from the White House "effective immediately", escalating his long-running feud with news organisations whose coverage he has been critical of.

On Friday, Trump announced the move in a post on Truth Social, accusing the three outlets of publishing "FAKE NEWS" and "FICTION and LIES" about him, his administration and the US, and further threatened to impose similar restrictions on other media outlets.

The White House declined to comment beyond Trump's post.

CNN said it stood behind its White House reporting and argued that journalists have a constitutional right to cover the administration without government interference.

"Should the ba...