Ukrainian drones have struck another Russian refinery, igniting a fire and producing massive black smoke. Ukrainian President Voldoymyr Zelenskyy said Thursday that the attack targeted the Syzran oil refinery, over 500 miles inside Russia. The governor of Russia’s Samara region reported two deaths but did not mention the refinery. Ukraine has expanded its strike capabilities, frequently targeting Russian oil assets that fund Moscow's invasion. These attacks have pressured Moscow's economy and President Vladimir Putin. Ukraine's intensified campaign has also supported recent battlefield gains, according to the Institute for the Study of War.