North Korea says leader Kim Jong Un observed the first test-firings of missiles from a recently launched destroyer and called for speeding efforts to boost his navy’s nuclear attack capabilities.

Reuters reported that North Korea's new class of warship was able to accommodate dozens of vertical launch cells to carry missiles its military has already developed.

North Korean leader Kim Jong Un has unveiled a new 5,000-tonne naval destroyer reportedly equipped with nuclear-capable ballistic missiles. The dictator attended the ship's launch ceremony at the Port of Nampo on Friday alongside his daughter and favoured successor,