A North Korean defector is filing civil and criminal charges against the country's leader Kim Jong Un for abuses she faced while detained in the country.

Choi Min-kyung fled the North to China in 1997 but was forcibly repatriated in 2008. She said she was sexually abused and tortured after her return.

When she files the case in Seoul on Friday, it will be the first time a North Korean-born defector takes legal action against the regime, said a South-based rights group assisting Ms Choi.

South Korean courts have in the past ruled against North Korea on similar claims by South Koreans but such verdicts are largely symbolic and ignored by Pyongyang.

The case names Kim and four other Pyongyang officials. The rights group, the Database Center for North Korean Human Rights (NKDB), says it also plans to take Ms Choi's case to the United Nations and the International Criminal Court.