North Korean leader Kim Jong-Un has executed two top national officials for exhibiting a “disrespectful” posture, which the leader considered as disobedience.

As a penalty for what they did, Kim sent Deputy Premier Kim Yong Jin and Workers’ Party United Front Department’s head Kim Yong Chol to re-education camps. South’s Unification Ministry’s spokesman Jeong Joon-hee confirmed the news at a news briefing.

According to reports, the deputy premier was executed in July by a firing squad while the latter was released in mid-August after being sentenced to execution for  abuse of power.

The United Front Department takes care of the relationship between North and South Korea and conducts spying operations on the latter. Besides the above-mentioned top officials of the nation, Workers’ Party’s Propaganda and Agitation Department’s deputy chief Choe Hui Do has also been sent to the re-education camps and executed, the spokesperson confirmed.

In August, a South Korean newspaper reported that ex-agricultural minister Hwang Min and education ministry’s senior official Ri Yong-Jin were killed at a military academy in Pyongyang. The newspaper cited a reliable North Korean source that confirmed the use of an anti-aircraft gun for the killing.

JoongAng Ilbo added that Ri’s fault was that he fell asleep while a meeting presided over by Kim was ongoing. The victim had been interrogated ahead of his execution. It was then when corruption accusations associated with him were discovered, reports indicated.

USA Today verified the news and also believed that Hwang was killed because of his involvement in pushing policy proposals, which appeared to be one of the most challenging aspects of the leadership of the North Korean chief. Even before this incident, as confirmed by Jeong Joon-Hee, deputy to North Korean ambassador to Britain Thae Yong Ho shifted to South Korea from London as he was “sick and tired” of Kim’s regime.

The Sydney Morning Herald stated that the incidents marked the Kim Jong-Un “reign of terror” in North Korea, as called by South Korean President Park Guen-Hye.