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 reported strike comes two nights after Ukrainian forces launched a joint attack against the refinery that allegedly damaged multiple on-site facilities.

Overnight into January 26, an oil refinery in the Ryazan Oblast is likely on fire as a result of a drone attack. Footage posted online confirms a fire at the