Russian President Vladimir Putin signed a mutual defense agreement with North Korean leader Kim Jong Un during a visit to the East Asian country in June.
During a United Nations Security Council meeting on Wednesday Russia’s envoy questioned why its allies such as North Korea could not help Moscow when Western countries claimed the right to help Kyiv.
Russia and North Korea have deepened their political and military alliance as the Ukraine war dragged on, but sending Pyongyang's troops into combat against Kyiv's forces would mark a significant escalation that has sparked widespread international concern.
The defense chiefs of South Korea and the United States condemned North Korea's troop deployment to Russia in the "strongest" terms with "one voice" as they held the allies' annual defense talks at the Pentagon on Wednesday.