Ukraine struck Russia's Ryazan refinery, the country's 4th-largest oil facility, with drones that damaged the main crude processing unit and forced it offline. The refinery continues operating at reduced capacity. This is still a significant blow to Russian energy infrastructure over 750 miles from active fighting. The strike underscores Ukraine's expanding capacity to hit deep strategic targets inside Russia and raises pressure on Moscow's economic cushions as energy exports face both direct damage and market headwinds.