Russia and Eurasia

Ukraine has been doing this for at least a year, but these latest strikes on Russia's critical national infrastructure are more serious," Ferris told Sky News. "The Ukrainian drones are capable of attacking more frequently and deeper into Russian territory, as well as hitting some refineries numerous times." The strategy behind the strikes, Ferris says, is to damage the Russian economy. She said: "Attacking refineries in Russia does temporarily have an impact on production, and Ukraine is hoping that this will be sufficiently debilitating to Russia's economy - which depends on hydrocarbon production - to slow the progress of the war."