Ukrainian drone strikes hit southern Russian oil refineries and the port of Taganrog on the Azov Sea on Friday, where authorities declared an emergency and evacuated some residents, officials said.
Kyiv has beefed up its efforts in recent months to hinder Moscow's financial capabilities in its war against Ukraine, targeting energy infrastructure in retaliatory strikes and causing a nationwide fuel shortage.
Russia's defence ministry said its forces downed over 370 Ukrainian drones, including over the Moscow region.
In the port of Taganrog, near occupied Ukraine, social media videos showed plumes of smoke rising over the city.
Local governor Yuri Slyusar said he visited the port after "massive" night-time strikes.
