A panel of experts mandated by the UN's Human Rights Council said North Koreans had suffered "unspeakable atrocities", and that those responsible, including leader Kim Jong-un, must face justice.

The panel heard evidence of torture, political repression and other crimes.

Pyongyang refused to co-operate with the report and rejects its conclusions.

The UN commission said Mr Kim had failed to respond to an advance copy of the report, and a letter which warned him he could be held personally responsible for abuses.