Ukraine drone strike halts Moscow's largest refinery, heavy oil processing down

Ukrainian drones struck Gazprom Neft's Moscow refinery on September 20, causing fires in main distillation units and halting heavy oil processing, per three industry sources. This is a continuation of Ukraine's campaign against Russian energy infrastructure, but the scale—hitting Russia's largest refinery—marks a significant escalation. The outage could tighten Russian fuel supply and impact global refined product markets.