A Russian drone slammed into an apartment building in eastern Ukraine early Saturday while many were sleeping, killing three people and wounding 12 others, Ukrainian authorities reported.

The attack in Dnipro, Ukraine’s fourth-largest city, was part of a large Russian missile and drone barrage across the country that targeted power infrastructure.

A fire broke out and several apartments were destroyed in the nine-story building in Dnipro, the emergency services said. Rescuers recovered the bodies of three people, while two children were among the wounded.

Russia has been pummeling Ukraine with near-daily drone and missile strikes, killing and wounding civilians.

The Kremlin says its only targets are linked to Kyiv’s war effort. Russia's Defense Ministry asserted Saturday that the nighttime strikes hit military and energy sites supplying Ukrainian forces.

Moscow and Kyiv have traded almost daily assaults on each other’s energy targets as U.S.-led diplomatic efforts to stop the nearly four-year war had no impact on the battlefield.

Ukraine’s long-range drone strikes on Russian refineries aim to deprive Moscow of the oil export revenue it needs to pursue the war.

Russia wants to cripple the Ukrainian power grid and deny civilians access to heat, light and running water in what Kyiv officials say is an attempt to “weaponize winter.”