US defence chief Lloyd Austin said on Wednesday that Washington is “increasingly concerned” about the possible deployment of North Korean soldiers in Russia’s war against Ukraine. He said some of the thousands of North Korean soldiers sent to Russia have already moved closer to the border with Ukraine, and that they are wearing Russian uniforms and carrying Russian equipment. The defence secretary said the Kremlin apparently intends to use the North Koreans to support Russian troops in the Kursk region near the border with Ukraine, a development he called “disturbing.” The US estimates around …