Fox says this comes from Yonhap news Agency. There is a significant chance that this is just fake news coming from SK clowns.
Naewoe was known to have close links with South Korea's intelligence agency,[2] and according to the British academic and historian James Hoare, Naowoe's publications became "less partisan after the late 1980s and are often useful source of information on North Korea".[3] In 1999 Naewoe merged with Yonhap News Agency,[1] with materials on North Korea continued to be "distributed for free as part of the government's propaganda effort".
https://en.wikipedia.org/wiki/Yonhap