South Korea's
National Intelligence Service initially reported on May 12, 2015, that Hyon was purged and publicly executed near the end of April 2015 at Kanggon Military Training Area near Pyongyang. It was reported that he was executed – with an
anti-aircraft gun – for insubordination and sleeping during formal military rallies, in particular during an event in late April 2015 attended by Kim Jong Un in which Hyon was captured on video napping. He was also mentioned in the North Korean newspaper
Rodong Sinmun the day he was supposed to have been executed. This would imply that he had been arrested and executed on the same day, which is unlikely. In July, official North Korea media named
Pak Yong-sik as the armed forces minister, but did not report Hyon's removal. A South Korean spokesman said that reports of Hyon's execution should be taken as rumors until there was definitive evidence. In April 2015, the US-based Committee for Human Rights in Korea released satellite imagery showing a shooting range lined with anti-aircraft guns apparently primed for an execution the previous October.
Tae Yong-ho, a North Korean diplomat who defected in August 2016 from the North Korean embassy in London, said that Hyon Yong-chol's execution was the result of wiretapped conversations at his home, and that wiretapping high-ranking officials has become the norm. ==Awards and honors==