South Korea's military says North Korea sent around 3,000 additional troops to Russia in January and February in continued support for Russian President Vladimir Putin's war on Ukraine. The South's Joint Chiefs of Staff said North Korea has also been sending more missiles, artillery equipment and ammunition to help Russia. The Joint Chiefs also said they had assessed that 4,000 of the approximately 11,000 military personnel North Korea has sent to fight in the war against Ukraine have been killed or wounded. Separately, North Korea said leader Kim Jong Un observed tests of newly developed reconnaissance and attack drones this week and called for their increased production. It was the latest display of his country's growing military capabilities.