North Korea is advancing its nuclear capabilities, raising security concerns for South Korea amidst discussions of U.S.-North Korea dialogue.

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

Russia has supplied North Korea with more than 1 million barrels of oil since March, as a payment for weapons and troops sent to the war against Ukraine. According to an analysis of satellite imagery in a report published by a British-based nonprofit that uses high-tech to make data publicly available,

China is uneasy about North Korea's ties with Russia, fearing it may embolden Pyongyang against its interests amid regional tensions.