# Ukrainian Drones Set Yaroslavl’s Slavneft-YANOS Oil Refinery Ablaze, Hitting One of Russia’s Largest Plants

*Friday, August 28, 2026 at 8:07 AM UTC — Hamer Intelligence Services Desk*

**Published**: 2026-08-28T08:07:25.396Z (2h ago)
**Category**: conflict | **Region**: Eastern Europe
**Importance**: 8/10
**Sources**: OSINT
**Permalink**: https://hamerintel.com/data/articles/16062.md
**Source**: https://hamerintel.com/summaries

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**Deck**: Ukrainian attack drones have hit the Slavneft-YANOS oil refinery in Yaroslavl, one of Russia’s largest processing plants, igniting fires and sending multiple smoke columns over the complex. The strike shows Ukrainian drones reaching deep into Russia’s industrial heart and adds to a wave of reported attacks and air-defence activity across Russian territory.

Ukrainian forces have struck a key node in Russia’s energy system, setting part of a major oil refinery ablaze far from the front lines.

On the morning of 28 August, Ukrainian attack drones hit the Slavneft-YANOS refinery in Yaroslavl, north of Moscow, igniting fires and sending multiple plumes of smoke over the facility. The plant processes around 15 million tons of crude oil per year and produces gasoline, diesel, aviation fuel and other petroleum products, placing it among Russia’s largest refineries. Initial reports described the attack as a Ukrainian operation using long-range FP-1 drones. Video from the scene showed smoke billowing from the sprawling complex.

There was no immediate information in the available reports on the full extent of damage, operational disruptions or casualties among refinery staff. However, any successful strike on a plant of this size is significant, as such facilities sit at the centre of Russia’s domestic fuel supply and exports.

The refinery attack came amid a broader surge of activity in and around Russia. Overnight, explosions were reported in the Saratov region, with the Engels-2 airbase—home to Russian strategic aviation—named as a likely target of an attack. The extent of any damage there was still being assessed.

Russian authorities, for their part, said their air defences destroyed 512 Ukrainian drones over multiple regions overnight. In Sevastopol, they reported that a drone attack damaged a five-storey residential building, two kindergarten buildings and more than 15 vehicles, injuring four people, two of whom were hospitalized. In Pavlovsky Posad, another drone struck a Magnit supermarket, blowing out 46 windows and damaging two rooms and six vehicles.

Strikes on sites like Slavneft-YANOS suggest Ukraine is pursuing a campaign against military and economic targets inside Russia, not just near the frontline. Hitting a large refinery hundreds of kilometres from Ukrainian-controlled territory demonstrates the reach of its drone programme and forces Moscow to consider how to protect industrial infrastructure across a wide interior.

Key developments to watch include confirmation of the damage and any production impact at Slavneft-YANOS, Russian moves to reinforce air defences around major refineries and airbases, and whether subsequent Ukrainian strikes target additional energy or military facilities deep inside Russia. Together, these factors will show whether this is an isolated attack or part of a sustained strategy to pressure Russia’s war economy and stretch its air-defence network.