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.

Russia expected an easy victory in Ukraine when Moscow launched its invasion in February 2022. What it didn’t anticipate was that its army would become bogged down in years of grinding warfare, suffering over a million casualties by 2025.