Ukraine has scored further hits in systematic drone attacks on Russian oil facilities, according to the Ukrainian secret service. Drones triggered a fire at the Ryazan refinery south-east of Moscow during the night, the governor of the region, Pavel Malkov, wrote on Telegram on Wednesday morning. Three drones struck the factory, which belongs to Russia’s largest oil company Rosneft, media reports said. The oil refinery in Novoshakhtinsk in the Rostov-on-Don region was also hit, with Governor Vasily Golubev saying that the technical facilities had been shut down. According to the company, the p…