There were reports of both countries coming together to host a joint skating and ice-hockey team but it hasn't been confirmed.
The military build-up comes even as both Koreas engage in talks over the Pyeongchang Winter Olympics.
Media reports said South Korea is seeking to form a united women's ice hockey team for the Winter Olympics, although it hasn't been confirmed.
A Tehran official had earlier said there was no hope of saving some 30 missing crewmen before the ship sank
Japan's last outbreak of bird flu occurred in March last year
The attention of Japanese authorities was drawn after pictures of Yakuza tattoos covering Shirai’s back went viral on social media
The only North Koreans to qualify for the Winter Olympics, Ryom Tae-Ok, 19, and Kim Ju-Sik, 25, missed the registration 30th October deadline
People formed a human chain to save the family from an icy grave
Myanmar prosecutors sought charges on Wednesday against the two reporters under the Official Secrets Act