On the morning of 13 March, several drones caused explosions at the Ryazan oil refinery in Russia. A number of Russian Telegram channels posted the videos, Kommersant ukrainskyi reports 
According to the Russians, a heat exchanger unit is on fire at the refinery. The area of the fire is about 100 square metres.
At the beginning of the year, Russian media reported that drone strikes on the refinery had already caused problems with the export of petroleum products. In particular, in January, petrol exports fell by 37% and diesel by 23%. The Russian Ministry of Energy explained this, among other things, by “unscheduled repairs” at the refineries. Yesterday’s drone strike put the Tuapse refinery, which was estimated to produce 5% of Russia’s oil products, out of commission.
The map of Russian refineries looks like this:
