The United States is concerned by Russia's growing relationship with North Korea and by what technology the two countries may be exchanging, the top U.S. arms control official said on Wednesday. Speaking to Reuters in Bucharest at a forum on preventing nuclear and radiological terrorism,

North Korean troops have officially engaged in combat alongside Russian forces in Ukraine's Kursk region, marking a significant development.

U.S. State Department spokesperson Vedant Patel says on November 12 that the majority of some 10,000 North Korean troops sent to support Russia’s war against Ukraine are now “engaging in combat operations” in Russia’s western Kursk region.