MOSCOW (Reuters) -Primary oil processing at Russia's Novokuibyshevsk refinery, which is operated by the Rosneft oil company, has been halted since August 2 following a Ukrainian drone attack last week,

More than 120 firefighters were trying to extinguish a blaze at an oil depot in the Russian city of Sochi that was sparked by a Ukrainian drone attack, regional Governor Veniamin Kondratyev said early on Sunday on the Telegram messaging app.

Ukrainian drone attacks sparked a massive fire at an oil depot in a rare attack on the Black Sea resort of Sochi. Plumes of thick smoke rose above the city, forcing the airport to close and requiring more than 100 firefighters to tackle the blaze.