A Ukrainian drone attack sparked a fire at a logistics centre belonging to Wildberries, Russia's largest online retailer, in the city of Yekaterinburg, the company said on Friday.
Employees were evacuated from the facility in time, Wildberries said.
Three drones crashed onto the roof of a logistics centre, according to Denis Pasler, governor of the Sverdlovsk region, without specifically mentioning the company. Firefighters were working to extinguish the blaze, he said.
There were no reports of injuries.
Unverified photos and videos circulating on social media purported to show the attack and columns of smoke rising above a warehouse.
Russia has been waging a full-scale war against Ukraine for more than four years. Kiev has stepped up its counterattacks deep inside inside Russia in recent months, particularly using drones.
Wildberries sites in Russia have been targeted by Ukrainian attacks since mid-July. Dubbed the "Russian Amazon," the retail giant has increasingly found itself in Kiev's crosshairs as Ukraine seeks to disrupt the Russian economy and bring the impact of the war closer to ordinary Russians.