Russia said it shot down 92 drones over Leningrad region. Ukrainian strikes have disrupted refineries holding about 30% of Russian capacity since late October. A drone attack cut power in Kryvyi Rih.
Why it matters: Strikes on energy hit civilians and fuel supply.
A major oil hub in Russia's Volga region appears to have caught fire. Bloomberg cited NASA satellite fire data. Three refineries were hit since Friday.
Why it matters: Refinery damage can affect Russian fuel supply and exports.