Drone attack hits Kstovo refinery; output impact still unknown

The Kstovo refinery can process about 17 million tonnes of crude oil a year; a drone attack on 1 November triggered explosions and a major fire, with the effect on production still unconfirmed.

What happened at the refinery?

Local residents reported air-defence systems being activated and loud noises in the industrial zone overnight. Social media videos from about 04:11 showed several pockets of flame and tall plumes of thick black smoke above industrial buildings, visible from a distance.

ASTRA, an independent Russian publication, and the monitoring channels Exilenova+ and Supernova+ identified Lukoil-Nizhegorodnefteorgsintez, also known as NORSI, as the target. The official account stopped short of naming the facility.

Governor Gleb Nikitin confirmed a large-scale drone attack and said: “Russian air defences shot down over a hundred drones.” He also confirmed significant damage to an industrial enterprise in Kstovo District, but gave neither the site's name nor details of the damage.

Mayor Yuriy Shalabaev said “a piece of public infrastructure was damaged,” causing electricity and heating problems in parts of Kstovo. Authorities warned of temporary power cuts and restrictions on hot-water supply. Repair work was due to start after the air strike ended. Preliminary Russian figures showed no deaths or injuries, and damage assessments were continuing.

Rosaviatsiya temporarily restricted aircraft arrivals and departures at Nizhny Novgorod Airport. The agency also imposed restrictions at other airports in the Volga Federal District.

The attack caused a fire, an unnamed industrial site confirmed damaged and local utility disruption, but officials have not yet quantified the refinery loss.

Which units were hit, and what does Kstovo produce?

Preliminary OSINT assessments placed the fire near the AVT-5 and AVT-6 crude-oil processing units and equipment for processing heavy oil residues. Observers had not established the exact damaged location or the extent of the loss.

The refinery sits about 800 kilometres from the Ukrainian border. It ranks as Russia's fourth-largest refinery by capacity and second among the country's plants for motor gasoline output.

Besides gasoline, it produces diesel, aviation fuel, bitumen and other petroleum products. The plant supplies the Russian domestic market, and some output may support military logistics.

Kstovo's process units run as an interdependent production cycle. Damage to primary refining equipment can constrain other lines even without the plant's complete destruction.

The operating risk extends beyond the two units named in preliminary reports because each part of the cycle can affect the rest.

How does this compare with earlier attacks?

The refinery has faced several drone attacks, including in 2024 and during 2026. On 26 August 2026, a major fire caused damage that led to the suspension of operations at the plant.

Each renewed hit raises spending on repairs, replacement equipment and site security. Even a short shutdown can cut finished-fuel output.

At the end of October, Moscow extended a ban on diesel exports for certain supplier categories through the end of January 2027, while allowing exceptions for specified manufacturers. The government said the restrictions aimed to stabilize the domestic fuel market.

The practical effect is less room to absorb a supply loss: further refinery damage could complicate the resumption of refining operations and increase pressure for tighter state regulation of fuel supplies.

The latest fire lands inside a diesel export-control regime that already prioritizes domestic fuel availability.

What remains unconfirmed?

On the morning of 1 November, separate reports described a possible attack on the Novogorkovskaya combined heat and power station in Kstovo, which supplies energy to local industry. That claim required confirmation.

Ukraine's military command had not issued an official statement on the refinery strike itself. Emergency services remained at the site, and no confirmed assessment showed how much petroleum-product production the refinery had lost.

Operators should watch the formal damage assessment, the condition of AVT-5 and AVT-6, and the restoration of local power and heating. The key number is the share of Kstovo's 17-million-tonne annual crude-processing capacity that can keep running.

For now, the plant's operating status and any output loss remain unconfirmed.