Group 1 - Ukraine attacked the Kirishi oil refinery, known as Kinef, in Russia's Leningrad region, marking the second strike in a month as part of its strategy to pressure Russian energy facilities [1][3] - Kinef, owned by Surgutneftegas, has an annual processing capacity exceeding 20 million tons and is located approximately 100 kilometers southeast of St. Petersburg [2] - The refinery was previously attacked on September 14, which halted a primary processing unit with a capacity of around 150,000 barrels per day, with repair work expected to take about a month [3] Group 2 - Ukraine has intensified assaults on Russian refineries since August, targeting at least 15 refineries in the European part of Russia, leading to a reduction in Russian refinery runs to below 5 million barrels a day [3] - The attacks have resulted in a fuel crunch in Russia, prompting the government to impose a ban on diesel exports for resellers until the end of the year and extend a full ban on gasoline sales abroad until the end of 2025 [4] - Kinef is a key supplier for both the domestic market and exports, and Russia's ability to divert crude to the global market is diminishing due to these ongoing attacks [4]