Volodymyr Zelenskyy said earlier this month that Russia was trying to "conceal losses" of North Korean troops fighting against Ukraine.

South Korea’s spy agency said Friday a wounded North Korean soldier who was captured while fighting for Russia against Ukrainian forces has since died from his injuries, the Yonhap news agency reported.

Russia launched a massive attack on Ukraine’s energy grid, leaving many in the country in the dark over the holiday. Retired Col. Jack Jacobs shares his thoughts about recent developments in Ukraine and a potential twist in North Korea’s involvement.

U.S. President Joe Biden said on Wednesday he had asked the Defense Department to continue its surge of weapons deliveries to Ukraine, after condemning Russia's Christmas Day attack on Ukraine's energy system and some of its cities.

Ukraine's air force says it detected 184 missiles and drones, causing damage to energy infrastructure across the country.