The Trump administration is organising an international summit focused on countering the left-wing movement Antifa and other groups, three sources familiar with the matter said.

The effort highlights the shift in the US government’s counterterrorism priorities over the past year.

The conference, tentatively planned for June or July, will convene officials from various nations to discuss strategies for battling Antifa and encourage intelligence sharing, said the sources, who requested anonymity as they were not authorised to speak to the media.

US President Donald Trump has portrayed Antifa as a severe threat to the US.

Counterterrorism experts argue it does not exist as an organised entity, though people claiming affinity to Antifa have been involved in armed attacks in the US.