Russian authorities have blamed a Ukrainian drone attack for a massive fire at an oil depot near the Russian Black Sea resort of Sochi. The nearby Sochi airport has suspended flights.
Krasnodar Region Governor Veniamin Kondratyev said on Telegram that drone debris hit a fuel tank and 127 firefighters are battling the flames.
Russian authorities said the drone attack on the Sochi refinery was one of several carried out by Ukraine over the weekend, targeting installations in the southern Russian cities of Ryazan, Penza and Voronezh. The governor of Voronezh said four people were injured in a drone attack.
Russia's Defense Ministry said its air defenses intercepted 93 Ukrainian drones overnight, 60 of which were over the Black Sea region.
Meanwhile, a Russian missile strike destroyed homes and civilian infrastructure in the southern Ukrainian city of Mykolaiv, local officials say.
At least seven civilians were reported injured in the city, which has been under constant bombardment by Russian forces. Ukraine's State Emergency Service said three of the wounded were being treated in hospital.
The Ukrainian air force said Russia shot down 83 drones or 76 drones and seven missiles overnight, 61 of which were shot down. It added that 16 drones and six missiles hit targets in eight locations.
This comes after a particularly deadly week for civilians in Ukraine, including an attack on Kiev on Thursday that killed at least 31 people. (A2 Televizion)