North Korea Says It's Successfully Tested A New Submarine-Launched Missile

North Korea has boasted about testing a new type of ballistic missile that can be launched from a submarine, calling it a ‘significant achievement’ – in efforts to bolster its military might.

The test-firing on Wednesday came ahead of a weekend resumption of nuclear diplomacy with the United States.

That diplomacy largely remains stalemated after the February breakdown of a second summit between President Donald Trump and North Korean leader Kim Jong-un in Vietnam.

People watch a TV showing a file image of a North Korean missile launch in Seoul, South Korea. Image: Getty

North Korea has recently warned its dealings with the United States may end if it fails to come up with new proposals to salvage the nuclear diplomacy by December.

READ MORE: North Korea Launches Unidentified Missile Off Coast

READ MORE: Trump Says There's No Longer A Nuclear Threat From North Korea

The Korean Central News Agency (KCNA) said the test of the Pukguksong-3 missile off its east coast was successful and "ushered in a new phase in containing the outside forces of threat to (North Korea)".

Kim Jong-un watches the missile launch. Image: Getty

North Korea having an ability to fire a missile from a submarine is a threat to the United States and its allies because such launches are harder to detect early enough to respond.

The use of solid fuel also increases a weapon's mobility.

The missile launch came ahead of a weekend resumption of nuclear diplomacy with the United States. Image: AP

After Wednesday's launch, the US State Department called on North Korea "to refrain from provocations, abide by their obligations under UN Security Council resolutions, and remain engaged in substantive and sustained negotiations to do their part to ensure peace and stability on the Korean Peninsula and achieve denuclearisation."