North Korea says it has tested a new type of nuclear-capable cruise missile.

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 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 US and its allies have staged joint maritime missile drills off the Korean peninsula, drawing condemnation from North Korea.

Tensions on the Korean peninsula continue to rise after a US nuclear armed submarine docked in South Korea on Tuesday, a major provocation aimed at North Korea.

North Korea has accused the US military of conducting provocative surveillance flights which violate its airspace and trespass in its exclusive economic zone.