On Wednesday, Ukrainian drones knocked out power in the largest city in Russian-held Crimea and targeted facilities in central and southern Russia, as a fuel crisis deepened with Kyiv continuing to strike refineries and energy assets. The capital's Moscow oil refinery will be offline for at least six months after sustaining extensive damage in Ukrainian drone attacks, industry sources said, complicating Russian efforts to address fuel shortages across the world's largest country.

Russia's production of petroleum products and coke dropped 13.5% year-on-year in May, accelerating from earlier declines, the rare official data published on Wednesday showed. Russia, the world's third-largest oil producer, has ceased publishing much of its oil production and export data since its full-scale invasion of Ukraine in 2022.