Ukrainian drones have struck targets across several Russian regions including an oil pipeline pumping station, a refinery and a fuel depot, Russian and Ukrainian authorities say in an escalating campaign of strikes against energy infrastructure often hundreds of kilometres inside Russia.
Ukraine's General Staff said it had struck the Saratov oil refinery on the Volga river, causing a large fire.
Saratov regional governor Roman Busargin said on Telegram that "civil infrastructure" had been damaged in the strike but gave no more details.
