Ukraine captured two wounded North Korean soldiers who were fighting on behalf of Russia in a Russian border region, South Korea’s intelligence service said.

"Through various sources of information and intelligence, we assess that North Korean troops who have recently engaged in combat with Ukrainian forces have suffered around 1,100 casualties," the JCS said in a statement.

North Korean troops have been deployed to bolster Russian forces in the Kursk border region with Ukraine, where they are gaining battlefield experience despite initial heavy losses.