A Ukrainian drone strike set fire to Moscow's largest regional oil refinery on June 15, with industry sources reporting that key units were shut down. The Gazprom Neft-owned facility in the Kapotnya district is widely described as a major fuel supplier to the Moscow region. Multiple outlets confirm the attack, part of Ukraine's escalating campaign against Russian energy infrastructure that has doubled since the start of 2026. Russia's refinery capacity is increasingly vulnerable to long-range drone strikes, creating fuel supply pressure in Moscow.