North Korea is likely preparing to send additional troops to Russia after suffering heavy losses in battles against Ukrainian forces, South Korea's military said Friday.

The attack came as South Korea’s military said North Korea is preparing to send more troops to join Russia’s fight against Ukraine, despite Pyongyang suffering a high rate of losses among its existing deployment of 11,000 and seeing some of its soldiers captured.

Lt. Gen. Kyrylo Budanov said North Korea has already provided Russia with 120 self-propelled artillery guns and 120 multiple-launch rocket systems, with more to come.