A mine explosion is "producing" in Seoul, North Korea told the United Nations in a letter.
South Korea accuses Pyongyang of detonating mines in September, but North Korea says the incident was a "nefarious blockade move".
A mine explosion is "producing" in Seoul, North Korea told the United Nations in a letter.
South Korea accuses Pyongyang of detonating mines in September, but North Korea says the incident was a "nefarious blockade move".