Ukrainian attack drones launched by the SBU domestic security service have hit 12 Russian oil refineries during the war so far, a Ukrainian intelligence source told Reuters on Sunday.
Officials in the southern Russian region of Krasnodar said Ukrainian drones had attacked the Slavyansk oil refinery, 70km (45 miles) north of the regional capital, overnight.
The Ukrainian source said the refinery, which processes about 4.5 million metric tons of crude a year and produces fuel mainly for exports, had been attacked in an operation staged by the SBU security service and other Ukrainian forces.
"The agency is continuing to implement a strategy to undermine the economic potential of Russia and reduce the flow of petro dollars that Russia directs to the war," the source said.
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