North Korea's involvement in the war has sparked fears of global escalation, with Seoul especially concerned of Pyongyang's troops gaining experience.

North Korea confirmed for the first time on Monday that it had sent troops to fight for Russia in the war in Ukraine under orders from leader Kim Jong Un and that it had helped regain control of Russian territory occupied by Ukraine.

Pyongyang admitted for the first time that it has sent troops to fight against Ukraine, according to North Korean media.