A fire broke out at an oil refinery owned by the major Russian oil company Lukoil near the city of Ukhta in the Komi Republic, a region in northwestern Russia, news agencies quoted local authorities on Sunday as saying.
The agencies quoted the regional government as saying on Telegram that a fire broke out in one of the tanks at the refinery located four kilometers from Ukhta.
The cause of the fire is not yet clear.
Head of the Komi Republic Vladimir Uiba said the fire had been caused by a failure to comply with safety rules and not by Ukrainian drone attacks.
Ukrainian drone strikes on Russian energy infrastructure disrupted about 14% of the country's oil refining capacity this year, and raised domestic fuel prices, but had a minimal impact on electricity production, according to a report by the US intelligence agency.
The loss of some Russian refining capacity caused domestic prices to rise by 20% to 30% by mid-March and led to a halt in exports to focus on meeting domestic demand.
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