Originally posted by the Voice of America. Voice of America content is produced by the Voice of America, a United States federal government-sponsored entity, and is in the public domain. South Korean Officials Deny Talk About Kim Jong Un's Health William Gallo SEOUL, SOUTH KOREA - South Korea's government is disputing reports that North Korean leader Kim Jong Un is seriously ill after undergoing heart surgery. "We have nothing that could substantiate that[Kim Jong Un]has a health situation," a senior South Korean foreign ministry official told VOA. A South Korean presidential spokesperson earlier said Seoul has detected no unusual activity in North Korea and has "nothing to confirm" regarding the reports about Kim, who was absent from a key public celebration last week. The Daily NK, a South Korea-based online publication with a network of contacts in North Korea, on Tuesday reported Kim was in stable condition after a heart operation. The report cited unnamed "sources" who speculated the surgery was due to "a number of factors, including [Kim's] obesity, prolific smoking habits, and 'overwork.'" CNN, the U.S.-based television news network, later quoted unnamed U.S. officials who said they are "monitoring intelligence" that Kim is in "grave danger" after the surgery. The nature of the alleged intelligence was not clear. Another unnamed U.S. official quoted by Bloomberg News said, "the White House was told that Kim underwent surgery last week and took a turn for the worse." That report said Kim was in critical condition. Western countries are believed to have very few,if any,intelligence assets in North Korea, one of the most secretive and oppressive countries in the world. North Korea has not commented on the matter. .