Using satellite imagery and testimony from defectors, a human rights group in South Korea claims to have identified at least 12 potential mass graves in North Korea.

The Transitional Justice Working Group (TJWG) has interviewed nearly 300 defectors from the North over the last 18 months and combined their testimony with satellite images to locate areas where the bodies of people branded disloyal to the regime have been dumped.

Some of the sites are on the outskirts of towns and are where people who have been publicly executed are interred. Others are close to the regime's network of notorious labour and political prison camps.