At least 3,000 North Korean soldiers now inside Russia, US says CNNU.S. Says North Korean Troops Are in Russia to Aid Fight Against Ukraine The New York TimesWhy North Korea’s Deployment of Troops to Russia Really Matters Foreign PolicyU.S. Says North Korean Troops Are in Russia and Might Be Used in Ukraine War The Wall Street JournalNorth Korean troops are in Russia but their purpose is unclear, U.S. says The Washington Post