North Korea has already started the production of the anti-missile defence system and carried out the test to examine its performance, reports say

North Korea test-launched new anti-aircraft missiles and threatened serious consequences against the U.S. and South Korea due to their joint military drills. Leader Kim Jong Un oversaw the tests, labelling the missiles a significant defence system.

North Korea successfully test-fired a new anti-aircraft missile system, state-run media reported Friday, as Pyongyang continued to condemn U.S.-South Korea joint military drills.