A Chinese mercenary has shared details about North Korean soldiers allegedly killed shortly after they joined Russia's war effort in Ukraine.
South Korea has summoned the Russian ambassador in protest.
The country’s President Yoon Suk Yeol called the involvement “a grave security threat to the world.”Pyongyang and Moscow have stepped up their military cooperation since North Korean leader Kim Jong Un and Russian President Vladimir Putin signed a comprehensive strategic partnership treaty in June.
The first contingent of troops — which South Korean media reported was from an elite unit under North Korea's Special Operations Forces, also known as the "Storm Corps" — are currently stationed in military bases across Russia's Far East.
