Attacks on Russian oil facilities have created a fuel crisis and increased political pressure on the Kremlin.

Ukraine said it struck a pair of Russian oil refineries far behind the front lines on Sunday as President Vladimir Putin vowed to ramp up defenses.

President Volodymyr Zelenskyy has said Ukrainian weapons have struck an oil refinery in Russia's Ufa for the second time, referring to the strikes as "long-range sanctions". The…