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Live Briefing: Russia's Invasion Of Ukraine

RFE/RL's Live Briefing gives you all of the latest developments on Russia's full-scale invasion, Kyiv's counteroffensive, Western military aid, global reaction, and the plight of civilians. For all of RFE/RL's coverage of the war in Ukraine, click here.

DTEK, Ukraine's largest private energy company, said its four thermal power stations had been hit.

"The enemy again massively shelled the Ukrainian energy facilities," DTEK said in a statement. "The company's equipment was seriously damaged. At this very moment, energy workers are trying to eliminate the consequences of the attack."

Energy Minister Herman Halushchenko said the Russian strikes targeted the Dnipropetrovsk region in central Ukraine and the western regions of Lviv and Ivano-Frankivsk.

Halushchenko said one energy worker had been injured. DTEK also said there were casualties but provided no other details.

In Kharkiv, Ukraine's second-largest city, a psychiatric hospital was damaged and one person was wounded in a Russian missile strike, officials said.

Oleh Synyehubov, the head of the Kharkiv regional military administration, said a 53-year-old woman was injured in what he described as a strike by a Russian cruise missile.

Synyehubov said at the time of the attack about 60 patients and five staff had been in the building.

Photos from the scene showed a huge crater on the grounds of the facility and patients taking shelter in corridors.

Ukrainian air defenses shot down 21 of 34 Russian missiles fired in an overnight attack, the commander of the Ukrainian Air Force said on April 27.

Mykola Oleschuk said Ukrainian fighter planes, air defense missile units, mobile fire groups, and means of radio-electronic warfare were involved in repelling the Russian missile strikes.

Over the past month, Russia's military has increased its targeting of Ukrainian power infrastructure, attacking thermal and hydropower stations and other energy infrastructure almost daily.

Ukrainian officials have said the country has lost about 80 percent of its thermal generation and about 35 percent of its hydropower capacity, prompting the government to introduce scheduled blackouts in several regions.

In Russia, meanwhile, an oil refinery in Russia's Krasnodar region has suspended operations after a suspected drone attack early on April 27, local officials said.

"The work of the plant has been partially suspended. Exactly 10 UAVs (drones) flew into the plant. There was a strong fire. There may be hidden damage," Eduard Trudnev, the security director of Slavyansk ECO Group, which operates the plant, was quoted as saying.

A post on the Telegram messaging app showed what appeared to be a large explosion at the Slavyansk oil refinery.

Ukraine, which rarely comments on its targeting of Russian sites, said nothing publicly on the drone strikes.

With reporting by Reuters