South Korea will gradually take countermeasures in line with the level of military cooperation between Russia and North Korea, Deputy National Security Advisor Kim Tae-hyo told a briefing on Tuesday.

South Korea has summoned the Russian ambassador to demand the immediate pullout of North Korean troops allegedly deployed in Russia.

North Korean soldiers have been filmed receiving uniforms and equipment at a training ground in Russia’s far east, appearing to confirm reports from South Korea’s National Intelligence Service (NIS) that 1,