Fire reported at Russia's largest oil refinery amid Ukrainian drone attack on Omsk region

Omsk Governor Vitaly Khotsenko confirmed an ongoing drone attack but did not report any strikes on the refinery.

"Russian Defense Ministry air defense forces are repelling an attack by Ukrainian UAVs on the Omsk region," Khotsenko wrote on Telegram, urging residents to remain calm.

Ukrainian monitoring channel Exilenova+ reported that drones had struck the Omsk oil refinery, operated by Gazprom Neft, and that a fire was spreading in the industrial area.

The channel said the attack had continued for approximately four hours. The reported strikes and the extent of any damage could not be independently verified.

The Omsk refinery has an annual crude oil processing capacity of more than 21 million metric tons, making it Russia's largest refinery by capacity. It produces gasoline, diesel, aviation fuel, lubricants and petrochemical products.

The facility has reportedly been targeted in previous Ukrainian drone attacks. Ukraine's military confirmed a strike on a primary oil processing unit at the refinery on July 6, 2026. Another reported attack in October was followed by a fire at the site.

Ukraine has repeatedly targeted Russian oil refineries and other energy infrastructure in an effort to disrupt fuel supplies and reduce revenues supporting Moscow's war effort.

Ukraine's military had not publicly confirmed responsibility for the latest reported strike at the time of publication.