Iran fired two more long-range ballistic missiles on Wednesday as it continued military tests in defiance of US sanctions and fresh warnings from Washington.
Official moves towards the deployment -- fiercely opposed by China -- of a US missile defence system in South Korea highlight the inherent dangers of disunity in dealing with North Korea's growing military threat.
NATO member Poland invited manufacturers of short-range surface-to-air missiles for technical talks for a planned military revamp amid heightened tensions with Russia.
North Korea has slammed the South's recent ballistic missile test, calling it a "farce" aimed at showing off Seoul's military strength in the face of threats from Pyongyang.
North Korea test-fired two medium-range ballistic missiles, prompting a stern US reaction after President Obama hosted a landmark Japan-South Korea summit.
South Korea called Monday for the North to stop its "provocative" rocket tests, after the launch of dozens of rockets in recent weeks -- most recently Sunday -- that Seoul says threaten regional security.
North Korea fired short-range Scud missiles off its east coast for the second time in a week, drawing condemnation from Washington and Seoul as the allies held joint military exercises.