By Daria Tarasova-Markina and Tim Lister, CNNUkrainian drone attacks have killed at least eight people at warehouses in Russia, according to regional officials.Seven of those killed were working at a distribution centre at Kotovsk in the Tambov region. The eighth fatality was at a similar centre in Elektrostal in the Moscow region.The attacks are the most lethal Ukrainian strikes reported inside Russia in more than two years.Both facilities struck belonged to a Russian company, Wildberries, a major online retailer. Ukraine said the facilities were used in drone manufacture.A firefighting helicopter attempts to extinguish a fire at a Wildberries' warehouse in Elektrostal.AFP / Tatyana MakeyevaThe strike in Tambov left 25 people injured, seven of them critically, according to the region's governor, Yevgeniy Pervyshov.The drones "were equipped with warheads designed to cause a greater number of casualties", Pervyshov claimed, adding 28 had been shot down.In addition to the man killed at the plant in Elektrostal, 37 people were injured, eight seriously, according to Andrey Vorobiev, governor of the Moscow region.Ukraine has acknowledged carrying out the attacks."Two major logistics facilities were hit - in the Moscow and Tambov regions, more than 500 and nearly 700 kilometres from the frontline," Ukrainian President Volodymyr Zelensky said Saturday.The facilities were being used "to supply sanctioned components for drone production and navigation equipment"."A huge Wildberries warehouse covering 188,000 square metres is blazing brightly," a Ukrainian military statement said, "and black smoke can be seen for kilometres."Smoke billows from a fire at the Wildberries' logistics complexes in the town of Elektrostal.AFP / Tatyana MakeyevaVideo from both sides showed large plumes of grey smoke billowing into the sky.Wildberries said the fire at the Kotovsk site had been contained.Ukraine has until now focused its long-range drone attacks on Russian energy infrastructure and factories making weapons and military hardware, as well as Russian shipping.Zelensky said that in addition to the warehouse attacks, an oil facility was also struck on Saturday, as were additional targets in the Sea of Azov, the gateway to the Black Sea.In the past two weeks, Ukrainian drones have struck 172 vessels belonging to Russia's shadow fleet in the Black Sea and the Sea of Azov, according to Robert Brovdi, commander of Ukraine's Unmanned Systems Forces.- CNN