Ukraine denied Moscow’s claims on Sunday that a Ukrainian drone struck the Russian-controlled Zaporizhzhia nuclear plant, as Kyiv launched fresh strikes overnight on Russian energy sites . Ukraine’s General Staff on Sunday said Ukrainian drones had struck the Saratov oil refinery in southwestern Russia, causing a “large-scale fire.” It said the extent of the damage was being clarified, and claimed the refinery has been supplying Moscow’s war effort . The refinery belongs to Russia’s state oil