Ukrainian forces carried out what Russian officials said Wednesday was a mass drone attack on the Saratov region, causing damage to an industrial enterprise.

Saratov Governor Roman Busargin said the attack targeted the neighboring cities of Saratov and Engels, an area that is home to an airbase for Russian bomber planes.

The General Staff of Ukraine’s military said on Telegram its forces hit a Russian oil depot in Engels that provides fuel to the airbase.

Russia’s Defense Ministry said it destroyed 11 Ukrainian drones in the Saratov region, but did not say anything about damage in the area.

Ukrainian drone attacks are typically focused on the areas directly along the Ukraine-Russia border, with some targeting regions further into Russia. Saratov is located in southwestern Russia about 450 kilometers from Ukraine.

Russia’s Defense Ministry said Wednesday it also destroyed 21 total Ukrainian drones over Kursk, Rostov, Belgorod, Bryansk, Krasnodar, Volgograd and the Sea of Azov.

Ukraine’s military said Wednesday that Russian attacks overnight included 64 drones mostly targeting areas in central Ukraine.

Air defenses destroyed 41 of the drones over the Cherkasy, Chernihiv, Dnipropetrovsk, Kharkiv, Kirovohrad, Mykolaiv, Poltava, Sumy and Zhytomyr regions, the Ukrainian air force said.

Officials in Sumy said the attacks damaged a house and injured one person.

Some information for this report was provided Reuters