American and South Korean officials say there's evidence that North Korea has dispatched troops to Russia in a potential escalation of a nearly 3-year-old war with Ukraine

North Korea has sent 3,000 troops to Russia to support its war against Ukraine, South Korean lawmakers told reporters on Wednesday after being briefed by the national intelligence agency. (Reporting by Hyonhee Shin;

Defense Secretary Lloyd Austin confirmed that the U.S. government has evidence that North Korea has sent military forces to Russia, but he told reporters that the purpose of the deployment was not yet clear.

Ukraine, South Korea and the U.S. all confirm that North Korean troops are in Russia, training to possibly fight for Moscow. The Wall Street Journal unpacks the evidence.