A man has reportedly been arrested in South Korea, charged with abducting a prominent Christian leader in 2000.
The man, a 35-year-old ethnic Korean, was detained on Friday in connection with the disappearance of Rev Kim Dong-shik, according to South Korean media.
Mr Kim went missing in Yanji, China, near the border with North Korea.
There has long been speculation that Mr Kim was kidnapped by agents from Pyongyang, because of his work helping North Korean escapees in China.
A South Korean investigator told the country's Yonhap news agency on Tuesday that the detained suspect "was trained in Pyongyang".
"Nearly 10 North Korean agents and other assistants are believed to have conspired to abduct Kim," the investigator said.
The suspect is thought to have entered South Korea in August 2001, serving as a menial worker before he was spotted by a group of North Korean defectors, who reported him to the authorities.