Facility is located nearly 500 kilometers from the Ukrainian state border.
The attack caused at least four explosions, sparking a massive fire. Mass evacuations of workers from neighboring enterprises were reported online.
SBU sources told NV that anti-drone nets stretched over the fuel tanks failed to stop the Ukrainian UAVs.
The oil depot belongs to Pskovnefteprodukt LLC and stores diesel fuel, gasoline, and other petroleum products.
Explosions were heard overnight on Feb. 19 across Pskov Oblast.
Local governor Mikhail Vedernikov claimed that drones attacked 'civilian infrastructure' in the city of Velikiye Luki, where the oil base is located. He confirmed that the fuel tanks caught fire, while footage of the massive blaze and reports of evacuations circulated online.