Seoul: A group of North Korean soldiers disguised as "indigenous people" of Russia's Far East have engaged in combat with Ukrainian troops in Russia's western border region of Kursk, according to a Ukraine news report. Citing Kyiv's top military officer, RBC Ukraine reported that more than 11,000 North Korean soldiers are already stationed in the Kursk region and have taken part in battles against Ukrainian troops.According to Yonhap News Agency, these soldiers are mostly part of general military units and are equipped with documents to support their disguise as indigenous people. Anatolii Barhylevych, the chief of the General Staff of the Armed Forces of Ukraine, indicated that these troops are trained for operations in the European part of the region.The report highlights increasing security concerns regarding military cooperation between North Korea and Russia. South Korean and U.S. officials have confirmed the deployment of over 10,000 North Korean troops to Russia in support of its invasion of Ukrain e. Seoul's spy agency recently revealed that North Korean troops have been assigned to Moscow's airborne brigade and marine corps, and some have already entered combat following local adjustment training.The National Intelligence Service (NIS) also reported that North Korean troops might have suffered casualties or wounds, and efforts are ongoing to ascertain the details of the combat circumstances and the extent of the damage. On Sunday, the NIS confirmed that it is closely investigating intelligence reports of casualties among North Korean troops.Additionally, RBC Ukraine earlier reported, citing Global Defense Corp., that approximately 500 North Korean soldiers were killed in a Storm Shadow missile strike on the Kursk region.