Kim Jong Un may have cemented his power by killing his rivals , analyst says . Jang Sung - il was the vice chairman of North Korea 's top military commission . His removal would mark a major upheaval in North Korea 's leadership since Kim succeeded his father , who died in in 2011 . He has been removed and two of his close allies have been executed , South Korean lawmaker says . If confirmed , the executions would mark a major upheaval in North Korea 's leadership .
Kim Jong Un may have cemented his power by killing his rivals , analyst says . Jang Sung - il was the vice chairman of North Korea 's top military commission . He has been removed and two of his close allies have been executed , South Korean lawmaker says . If confirmed , the executions would mark a major upheaval in North Korea 's leadership .