Ukrainian drones struck two sprawling warehouses, one of them just east of Moscow, as part of attacks overnight and on Saturday afternoon that killed nine people and wounded more than 60, Russian officials said.

Kyiv's forces have pressed their relentless aerial campaign against energy infrastructure and military targets inside Russia, aiming to undermine Moscow's war effort and make Russians feel the consequences of the Kremlin's all-out invasion of Ukraine that is well into its fifth year.

Two sprawling warehouses of Russia's major online retailer, Wildberries, were hit by Ukrainian drones overnight, according to Russian officials — one in the town of Kotovsk in the Tambov region, some 360 kilometers (220 miles) from the border with Ukraine, and another in the city of Elektrostal, about 50 kilometers (30 miles) east of Moscow.

READ MORE: Ukrainian drones batter Russian oil facilities and set more oil tankers ablaze

A Ukrainian drone also hit an oil depot in the city of Noginsk, just north of Elektrostal, sparking a fire and prompting evacuations of a nearby maternity hospital and a residential building, according to the governor of the Moscow region, Andrei Vorobyov. Drone debris also hit a kindergarten building, Vorobyov said, sparking a fire that has since been put out.