Zelenskyy asks allies to act on reports of North Korean troops helping Russia POLITICO EuropeSouth Korea warns it can send arms to Ukraine after reports of North’s troops in Russia The Associated PressNorth Korean shock troops in Ukraine? South Korea summons Russian ambassador over reports. USA TODAYNorth Korea is sending thousands of soldiers to help Vladimir Putin The EconomistNorth Korea sending troops into Ukraine could supercharge an already-close partnership with Russia Business Insider