The refinery was attacked by at least 29 drones, 7 fires broke out, and one refinery employee was injured.

On the night of August 28, the Kuibyshev oil refinery in Samara was attacked by at least 29 Ukrainian UAVs. The Ministry of Defense of the Russian Federation reported that a total of 21 UAVs were shot down over the region during these days. The local authorities did not confirm the attack on the refinery, reporting that the attack was repelled, and the fire was quickly extinguished, without naming what exactly was burning.

According to ASTRA sources in the Ministry of Emergency Situations of the Russian Federation, after a massive attack, at least 7 fires broke out at the plant, as of August 28, the plant completely stopped its work.

So, one of the drones hit the AVT-4 primary oil refining unit, it caught fire. The UAV also hit a liquefied gases overpass, which also subsequently caught fire. In addition, drone strikes at the Kuibyshev refinery were recorded in a gas pipeline, a gasoline pipeline, an AVT-5 installation, a hydrogen production plant, and a diesel fuel tank, as a result of which fuel was spilled, and the fire moved to another similar tank.

One employee of the company, Nikita Starodub, was injured and hospitalized.

In August 2025, the volume of idle (unused) Russian refining capacities reached a record high of 6.4 million tons per month states Reuters. Attacks by Ukrainian drones caused the downtime of up to 3.1 million tons of processing in August (that is, almost half of the total downtime — 48%). Russia has lost about 17% of its refining capacity, which is about 1.2 million barrels per day, the media claims.