Ukrainian drones struck oil-industry sites deep inside Russia again overnight on 23 July, setting off fires that burned into the morning, monitoring channels reported. The targets sat far behind the front, and Russian air defenses reported downing drones over more than a dozen regions. Ukraine's military had not claimed the strikes by morning.

Bashkortostan: a pipeline node, not just a refinery

Ukrainian monitoring Telegram channels Exilenova+ and Supernova+ reported a strike on the Subkhankulovo pipeline dispatch station near Tuymazy in Bashkortostan, about 1,300 kilometers from the front. Residents reported roughly eight impacts and a burning storage tank. Long-range Liutyi drones carried out the strike, Supernova+ said. The station belongs to Transneft-Ural and moves crude and fuel between Bashkortostan, Tatarstan, and other Russian regions.

Russian news Telegram channel Astra placed the fire at the station from eyewitness footage. Bashkortostan's emergencies committee later confirmed a fire, blaming falling debris — the explanation Russian officials routinely give for such strikes. A node like this is slower to repair than a single refinery, because it feeds several pipeline routes at once. 

Ukraine burned another Transneft-Ural station in the same republic on 8 July.

Ulyanovsk Oblast: fire at the NS-Oil site

Drones also hit the NS-Oil facility at Novospasskoye, about 800 kilometers from the war zone. Supernova+ published footage of a large fire, and Militarnyi reported drones had struck the refinery. Ulyanovsk governor Alexei Russkikh claimed drones hit a fuel-and-energy site and started a fire.

Monitoring channels differed on the target. Exilenova+ described a liquefied-gas base, while Astra identified the refinery itself. The plant makes gasoline, diesel, and fuel oil. Accounts of its size varied widely, with Astra citing 30,000 tonnes a year and other channels putting it as high as 600,000. 

Ukrainian drones hit the same plant in October last year.

Elsewhere overnight

Drones also reached Voronezh, the capital of a Russian region, bordering Ukraine's occupied northeast, where residents reported explosions. Voronezh governor Alexander Gusev claimed a falling drone set a detached house alight and killed a three-year-old boy, injuring his parents. He said the roof of an online retailer's warehouse was damaged. The company—Wildberries—had already halted night work after earlier strikes.

In occupied Crimea, the monitoring channel Krymsky Veter reported explosions near Feodosia, Yevpatoria, Sevastopol, and Yalta, and said Russian-installed Sevastopol governor Mikhail Razvozhaev claimed a drone attack on the city. Russia's Defense Ministry claimed it downed 223 drones overnight.