SSU, DIU drone strike at primary oil refinery in Tatarstan - sources

The long-range drone attack on the oil refinery in Nizhnekamsk, Russia, was an operation of the DIU and the SSU. The attacked refinery is one of the five largest oil refineries in Russia.
This was reported by Censor.NET citing the sources.
Thus, a Ukrainian long-range drone hit the primary oil refining unit at the Nizhnekamsk refinery, causing a fire.
According to the source, the refinery's capacity was 8 million tonnes of oil, which is 2.6% of Russia's total annual refining capacity. This refinery is one of the five largest refineries in Russia.
Earlier, Russian media reported that a drone attacked an oil refinery complex in Nizhnekamsk, Tatarstan, in the morning.