KYIV, Ukraine (AP) — Russia struck Ukraine with a thunderous aerial bombardment overnight, authorities said Friday, further dampening hopes that the warring sides could reach a peace deal anytime soon days after Kyiv embarrassed the Kremlin with a surprising drone attack on military airfields deep inside Russia.

The barrage was one of the fiercest of the three-year war , lasting several hours, striking six Ukrainian territories, and killing at least four people and injuring about 50 others, Ukrainian officials said. Among the dead were three emergency responders in Kyiv and someone who was pulled from the rubble of an apartment building in a northwestern city.

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