Russian air defense systems have shot down 17 Ukrainian drones overnight in several western parts of the Russian territory, according to the country's defense ministry.
"The air defense systems intercepted and destroyed seventeen Ukrainian UAVs," the ministry said in a Telegram post on Sunday.
According to the ministry, three drones were shot down in the Kaluga region, nine were downed in Bryansk, three in Kursk, and two in Belgorod.
A regional official said the attack in Kaluga region, south of Moscow, targeted an oil storage facility.
Kaluga’s governor, Vladislav Shapsha, said the drones fell close to an oil depot near the town of Lyudinovo. There were no casualties or damage, he said.
Ukraine has been making repeated attempts to strike Russian targets inside the country, including buildings and towers, refineries, and oil storage facilities.
Russia has retaliated, striking Ukraine's energy facilities, and triggering major blackouts and energy shortages in the country.
On Saturday, Russian missiles targeted DTEK, Ukraine’s largest private electricity company. Till now, four of its six thermal power plants have been damaged in the strikes.
In another development, several explosions were reported in western Ukraine's Khmelnytskyi region. However, there have been no reports regarding the cause or specific location of the explosions. Earlier, an air raid warning had been issued for the region.
Ukraine’s President Volodymyr Zelensky, on Saturday, repeated his pleas to his Western allies to further support him by providing more arms and munitions for Kiev's forces to fight against the Russian troops.
He asked them in particular for the US Patriot missile system, while insisting on faster deliveries.
Last week, Washington agreed to a new military aid package as it continued to provide US support to Ukraine.
Zelensky claimed Russia had targeted the Ukrainian gas and electricity transit facilities that were important for gas supply to the European Union.