New reports are suggesting the entire family of Kim Jong-Un's uncle, who was executed in December, were also killed in an attempt to "clamp down on mutiny".
Jang Song Thaek, 67, was sentenced to death on December 12 after being accused of attempting to dethrone his nephew in an alleged military-backed coup.
Yonhap News Agency is now claiming all of Jang's direct relatives were called to the capital and executed.
"Extensive executions have been carried out for relatives of Jang Song Thaek," a source told the paper.
"All relatives of Jang have been put to death, including even children."
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According to the paper, Jang's sister, her husband and ambassador to Cuba, and the ambassador to Malaysia were killed.
Sons, daughters and grandchildren of Jang's two brothers were also reportedly killed.
"Some relatives were shot to death by pistol in front of other people if they resisted while being dragged out of their apartment homes," a source said.
Others have reportedly been spared in 'the purge of the Jang Song-thaek people' but sent to remote villages so that "no traces of [Jang] be left".
The reports come as North Korea's top military body urged an end to all hostilities in an open letter to South Korea sent on the order of leader Kim Jong-Un.
"What is important for paving a wide avenue for mending North-South relations is to make a bold decision to stop all hostile military acts, the biggest hurdle stoking distrust and confrontation," the letter from the National Defence Commission said.