KYIV, Ukraine (AP) — Russia launched a barrage of missiles against Ukraine overnight, in attacks that appeared to target the country’s energy infrastructure. Meanwhile, Russia said its air defense systems had intercepted more than 60 Ukrainian drones over the southern Krasnodar region.

Ukraine’s air force said Saturday that Russia had launched 34 missiles against Ukraine overnight, of which 21 had been shot down by Ukrainian air defenses.

In a post on Telegram, Minister of Energy Herman Halushchenko said energy facilities in Dnipropetrovsk in the south of the country and Ivano-Frankivsk and Lviv in the west had been attacked and that an engineer was injured.

Private energy operator DTEK said four of its thermal power plants were damaged and that there were “casualties,” without going into detail.

Earlier this month Russia destroyed one of Ukraine’s largest power plants and damaged others in a massive missile and drone attack as it renewed its push to target Ukraine’s energy facilities.