Ukraine attacked an oil refinery in Russia's Kaluga region in the early hours of Friday, setting the facility on fire, according to Russian media reports.
Several explosions were heard in the Dzerzhinsky district of the Kaluga region, which borders the broader Moscow region, The Moscow Times reported, citing Russian Telegram channel SHOT.
CNBC could not independently verify the reports.
Vladislav Shapsha, governor of the Kaluga region, said in a Google-translated post via Telegram that the fire was promptly extinguished, and the extent of the damage was still being assessed.
He did not say at what facility the incident took place.
Persons:
Vladislav Shapsha
Organizations:
Moscow Times, Russian Telegram, CNBC
Locations:
Ukraine, Russia's Kaluga, Dzerzhinsky, Kaluga, Moscow