Ukrainian drones conducted a large overnight strike on Russia's Yaroslavl oil refinery and other targets across western Russia on April 26, 2026, causing fires and injuries according to Ukrainian and Russian officials. The Yaroslavl refinery (15 million-ton annual capacity) was hit, a major chemical plant in Vologda Oblast was struck injuring workers, and drones reached targets 800+ kilometers inside Russia including Belgorod and Crimea. This marks Ukraine's continued ability to conduct deep-penetration strikes on Russian strategic infrastructure despite Russian air defense claims of intercepting 203 drones — a pattern that demonstrates the ongoing pressure on Russia's energy and military logistics despite two years of war.