North Korea has carried out a trial of its underwater nuclear weaponry system in a demonstration against the joint military exercises conducted this week by South Korea, the US, and Japan, which “seriously” threatened the “security” of Pyongyang.

North Korean Foreign Minister lauds the “comradely” ties with Russia, while holding talks with Russian President Vladimir Putin in Moscow, where they discussed international affairs and bilateral cooperation.

North Korea’s leader, Kim Jong-un, calls for constitutional change to identify the south as “number one hostile state.”

North Korea has launched over 200 rounds of artillery shells from its west coast towards the South's Yeonpyeong Island.

The North Korean leader was addressing an event at the end of five days of year-end party meetings.

North Korea rejected reunification with the South, vowing “serious action” in repose to any “military confrontation” by Washington and Seoul.

The North Korean leader has ordered the military to speed up war preparations, including its nuclear weapons.

North Korean leader Kim Jong-un has said that his country would launch a nuclear attack if an enemy provokes it with nuclear weapons, apparently referring to the United States, according to state media.

South Korea says the long-range weapon was a solid fuel-powered ballistic missile.

North Korea has begun its reconnaissance satellite operations after successfully launching its first military satellite last month.