Yaroslavl Governor Mikhail Yevrayev also confirmed a drone attack on his region, though Russian officials did not report damage to the local refinery. Yaroslavl’s Slavneft-Yanos refinery is Russia’s fifth-largest, with a capacity of about 15 million tons a year, or about 300,000 barrels a day. The plant, jointly owned by Rosneft Oil Co. and Gazprom PJSC units, supplies fuel to central and northwestern Russia and has been struck at least four times since December 2025.