A sustained campaign of long-range Ukrainian drone strikes was the primary cause of the crisis. Key attacks included:
Overall, more than 20% of Russia's refining capacity was knocked offline by the attacks, according to reports from The Wall Street Journal and the International Energy Agency.
The crisis became nationwide. Independent outlet Zona Media published a map on June 26, 2026, documenting fuel rationing in 56 of Russia's 83 regions. Bloomberg on June 23 reported that "more than two-thirds of the nation's regions" had implemented fuel rationing or were experiencing supply interruptions.
In Crimea, drivers were prohibited from refueling their vehicles to prioritize military needs.
Regional restrictions included per-person purchase limits (as low as 20 liters per customer), hours-long queues, and outright closures of some gas stations.
In his statement after the June 28 strikes on the Slavyansk and Yaroslavl refineries, Ukrainian President Volodymyr Zelenskyy said: "This night, our long-range sanctions reached two oil refineries in Russia." He described the drone campaign as a systematic effort to weaken Russia's war capability by imposing economic pain through direct strikes on energy infrastructure, rather than waiting for international sanctions to take effect.