US President Donald Trump has suggested some TV networks should have their licences "taken away", as he backed America's broadcast watchdog in a row over the suspension of ABC host Jimmy Kimmel.

The network announced that it was pulling the comedian off air "indefinitely" amid a backlash over his remarks about the murder of conservative influencer Charlie Kirk.

Kimmel appeared to suggest the suspect was a Trump supporter.

Authorities in Utah, where the shooting occurred, have said he was "indoctrinated with leftist ideology".

ABC axed the show after the Federal Communications Commission threatened regulatory action - raising concerns the Trump administration was curtailing the free speech of its critics.

The FCC's chair, Brendan Carr, a Trump apointee, accused Kimmel of "the sickest conduct possible" and said firms like the Disney-owned ABC could "find ways to change conduct and take action... or there's going to be additional work for the FCC".