ALSO READWomen plead not guilty to murdering North Korea leader's half-brother Five assumptions we make about North Korea - and why they're wrong We can target all of US, says Kim Jong Un after North Korea tests ICBM Kim Jong-un promotes sister Kim Yo-jong to North Korea's senior party post 'Rocket Man' Kim Jong-un should have been handled long time ago: Trump
Hwang Pyong-so, a key member of Kim Jong-un's inner circle and touted as a powerful military figure, has mysteriously vanished from public life.
The vice marshal, who held the most senior position in North Korea's military, hasn't been seen in public since October 13.
This has subsequently sparked rumours that he was executed by a North Korean death squad after allegations of bribery, the local media reported.
According to Yonhap News Agency, South Korea's spy agency reported Hwang and his deputy, Kim Won-hong, were expelled from the military's General Politico Bureau and "punished." The agency added it was looking into details about their punishment.
The news agency reported that Kim Won-hong was sentenced to one of North Korea's prison camps. As for Hwang, reports said that Jong-un has indeed killed him.
Kim has previously killed his enemies via a variety of gruesome methods, including shooting them with anti-aircraft weaponry at a close distance and feeding them to a pack of ravenous dogs.