The US President Donald Trump says that he knows how the North Korean leader Kim Jong Un is doing amid series of unconfirmed media reports on the latter’s health, but refused to talk in detail, South Korea’s Yonhap News Agency reported Monday. 

Latest news: North Korean leader Kim Jong Un is receiving treatment after undergoing a cardiovascular procedure early this month, a South Korean media report said, amid speculation over Kim's health following his absence from a key anniversary event.