.Ukraine carries out some of its own biggest-ever drone strikes on Russia CNNUkraine Hits Moscow Oil Refinery in Substantial Drone Onslaught The Commercial JournalUkraine launches enormous drone assault on Russian electricity facilities The Washington PostRussia Hits Kharkiv Sports Center After Moscow Refinery Fire BloombergFirefighters Extinguish Oil Depot Blaze in Southern Russia 2 Weeks After Drone Strike The Moscow Times.