On July 6, Ukraine's Defense Forces launched a long-range drone strike against the Omsk Oil Refinery, located roughly 2,500 kilometers from the front line in southwestern Siberia.
The Omsk refinery is russia's largest by annual processing capacity, capable of refining 22 million tonnes of crude oil per year. For comparison, the Tuapse Oil Refinery, one of Ukraine's most notable previous refinery targets before it suffered extensive damage, had an annual capacity of about 9 million tonnes.
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Considering that long-range drones rarely fly in a straight line to avoid russian air defenses, the actual flight path may have approached 3,000 kilometers, making this one of Ukraine's longest-range strikes to date, if not the longest.
Judging by available imagery, the attack was likely carried out using a new long-range variant of the FP-1 drone, featuring a redesigned airframe and extended range. If confirmed, this would represent the combat debut of the upgraded FP-1 configuration, potentially signaling the beginning of a new phase in Ukraine's long-range strike campaign.
This was not the first attack on the Omsk refinery. The facility experienced two major incidents in 2024, after which reports indicated that roughly half of its processing capacity was temporarily taken offline.
The full extent of the latest damage has yet to be determined. Preliminary reports suggest that the CDU-VDU-11 crude distillation unit may have been hit. According to available information, between two and seven Ukrainian drones reached the refinery, triggering a major fire.
Until now, the Omsk Oil Refinery had remained one of only two facilities among russia's ten largest refineries that had either never been struck during the full-scale war or had not been attacked for a prolonged period and had apparently resumed normal operations. This latest strike appears to have changed that.
As a result, only one refinery among russia's top ten by processing capacity now remains untouched since the start of the full-scale invasion: the Angarsk Petrochemical Company in the Irkutsk region. Located approximately 4,450 kilometers from the front line, the refinery has an annual processing capacity of 10.2 million tonnes.
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