North Korean leader Kim Jong Un is in grave danger after heart surgery, according to a US official with direct knowledge.

Kim had been present at a government meeting four days before the celebration of his grandfather’s birthday on April 15. Kim missed the main event which raised about his well-being. As he has a habit of excessive smoking, obesity and overwork received the cardiovascular system procedure according to the news site and is now receiving treatment in a villa in Hyangsan County.

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There are also speculations that he appointed her sister Kim Yo-jong as a cabinet member. She also becomes the single most important figure in the North Korean regime after her brother. In the event of Kim’s death, there has been a lot of speculation as to whom powers will go as North Korean leader Kim Jong Un is in grave danger after heart surgery.