Ukraine launched a drone attack on Russia's Omsk region on November 11, with the country's largest oil refinery among the targets.

Axar.az reports, citing The Moscow Times, that Regional Governor Vitaly Khotsenko confirmed that Ukrainian drones had attacked the region but provided no further details.

The Omsk Oil Refinery, owned by Gazprom Neft, has an annual processing capacity of 22 million tonnes. The facility accounts for one-sixth of Russia's production of petrol and diesel fuel.

The refinery is located approximately 2,500 kilometres from the Ukrainian border. It was previously targeted on October 8.