Ukrainian drones hit a Russian oil refinery in the city of Ryazan overnight, causing a fire and damaging equipment at one of Russia's biggest refineries, four industry sources told Reuters on Friday.
The sources said oil storage at the refinery had been set ablaze. Among damaged equipment were a railway loading rack and a hydrotreater unit used to remove impurities from refined products. Reuters was not immediately able to reach Rosneft , Russia's large state oil company, which owns the refinery.