A top South Korean official says Russia has supplied air defense missile systems to North Korea in exchange for Pyongyang sending troops.

In a joint statement with the foreign ministers of Australia, Canada, France, Germany, Italy, Japan, South Korea, New Zealand, the United Kingdom and the High Representative of the European Union, the U.S. spoke out against the deployment of North Korean ...

Pyongyang has long coveted an advanced air-defense system to guard against missiles and war planes from the United States and South Korea.