Ukraine has been enjoying more success with its drone operations in Russia as it goes after Moscow's oil facilities, military analyst Sean Bell says.
Speaking on Sky News, Mr Bell highlighted two separate Ukrainian drone strikes on oil refining and storage facilities in the Rostov region.
Russian Telegram channels reported that three oil tanks were on fire at a depot in the Kamensky district after two drones fell on the area overnight (see our 6.21 post)
Meanwhile, fires from Ukraine's previous strike on an oil depot on 18 August are still burning.
"Over the last few weeks we've been covering this, Ukraine's success with their drones seems to be increasing," Mr Bell says.
"President Zelenskyy has claimed that Ukraine has actually developed a new long-range drone. We don't know anything about it, but the results seem to be playing out on the battlefield."
He added: "They seem to be targeting a lot of Russian oil facilities, not just the refining facilities, but the storage facilities as well.
"Why are they doing that? Because Russia generates huge revenues by exporting that oil. Therefore, by damaging the facilities, you reduce the revenues, which reduces Russia's ability to fund the war."
