On Sunday, Ukrainian drones struck one of Russia’s largest oil refineries, the Kirishi refinery in Russia’s Leningrad region, causing a fire. It comes as Ukraine has been attacking Russian oil infrastructure for weeks. Meanwhile, Romania says a Russian drone entered its airspace on Saturday. The Romanian Defense Ministry issued a statement saying that it “strongly condemns the irresponsible actions of the Russian Federation.” Last week, Russian drones also entered Poland’s airspace, before NATO jets shot them down.