Ukraine has struck Russia's largest oil refinery, forcing a complete shutdown. A long-range drone attack on the Omsk facility, located deep in western Siberia, knocked out its main processing unit on July 6.

The refinery accounts for about 12% of Russia's total refining capacity. Regional Governor Vitaly Khotsenko confirmed the drone strikes and resulting fire. This is part of a sustained Ukrainian campaign against Russian energy infrastructure. In June alone, forces struck at least 11 refineries, causing significant fuel shortages.

The attack creates a critical paradox: Russia possesses vast crude oil reserves but is losing its ability to refine it into usable fuels like gasoline and diesel.

The impact extends beyond Russia's borders. While Russia could export more raw crude, global markets for refined products may tighten if Moscow redirects supplies to address domestic shortages.

Traders are closely monitoring two key factors: how quickly the Omsk refinery can restart operations, and whether Ukraine continues its strikes on remaining Russian facilities.