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.

North Korea says it has test-launched new anti-aircraft missiles, as its military threatens unspecified grave steps against the U.S. and South Korea over their military drills.

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