North Korea has axed its spy chief as well as the long-running head of Kim Jong Un’s security — signs of a major shakeup during the ongoing mystery over the dictator’s status. Jang Kil Song was ousted as head of the Reconnaissance General Bureau (RGB), the North’s military intelligence agency, according to the Korea Herald, citing a report by South Korea’s Unification Ministry. The RGB is behind the Hermit Kingdom’s most high-profile attacks as well as spy missions, including those against the US, the report says.