Russian and Ukrainian forces carried out some of the most far-reaching drone strikes in recent weeks overnight into Friday, hitting energy production sites in Russia and rail and power infrastructure in Ukraine as the war’s aerial campaign continues to intensify and stretch deeper into both countries’ rear areas.

Ukraine launched waves of long-range drones toward Russia’s industrial heartlands, with regional authorities reporting strikes across central Tatarstan and the Volga region, areas that host key oil refining and petrochemical facilities. Officials in Tatarstan said industrial sites were targeted and precautionary measures were taken in nearby cities, including the cancellation of public events in Nizhnekamsk during Russia’s national holiday period.

The region is home to major energy and chemical production complexes, including facilities linked to Sibur and Tatneft, both central to Russia’s downstream fuel output. Regional officials did not immediately specify the extent of damage, but acknowledged heightened security alerts as drones were reported over multiple locations.

Further east, local authorities said Ukrainian drones struck an apartment building in Tatarstan, injuring several people, while additional strikes were reported in Russia’s Bryansk border region, where officials said civilians were killed and wounded in separate attacks. Russia’s defense ministry said it intercepted more than 200 Ukrainian drones overnight, underscoring the scale of the assault.