North Korea blows up the four-storey Inter-Korean Liaison Office in the Kaesong Industrial Region, according to South Korean authorities. Kim Yo-jong, the sister of Supreme Leader Kim Jong-un, had earlier threatened to destroy the "useless" building. A neighbouring apartment complex used by South Korean officials appears to have partially collapsed in the explosion.
Chinese Communist Party general secretary Xi Jinping is expected to visit Pyongyang at the invitation of Korean Workers' Party chairman Kim Jong-un to attend the celebration of the 70th anniversary of North Korea's founding.
North Korea says the United States has "crossed the red line in our showdown" after placing sanctions on its leader Kim Jong-un over human rights abuses, and considers the sanctions to be a "declaration of war" by the United States.
North Korea's supreme leader Kim Jong-un says his country will soon conduct a nuclear warhead test and test launch ballistic missiles capable of carrying nuclear warheads, according to North Korea's state media.
2013 Korean crisis: The annual session of North Korea's Parliament, the Supreme People's Assembly, takes place in Pyongyang, following repeated threats of violence by the leader Kim Jong-Un against South Korea and the United States. Choi Bu-Il is appointed Minister of Internal Security.