a South Korean media report said North Korea's vice premier was executed by firing squad this year after

a South Korean media report said North Korea's vice premier was executed by firing squad this year after showing discontent with the policies of the country's leader Kim Jong-un. 
Yonhap News Agency cited an unnamed source as saying that the 63-year-old Choe Yong-gon, a former delegate for North-South cooperation, was executed, marking another death of a senior official in a series of high-level purges since Kim Jong-un took charge in late 2011. 
The Yonhap report said Choe had expressed disagreement with Kim's forestry policies in May and had shown poor work performance. 
Choe was appointed vice-premier in 2014, North Korea's state-run KCNA news agency reported previously. Choe was last seen publicly in December, South Korea's unification ministry said. He had worked on inter-Korean affairs in 2000s, leading the North's delegation in joint economic cooperation committees with South Korea between 2003 and 2005.