The barrage, one of the fiercest of the three-year war, struck six Ukrainian territories, killing at least six people and injuring about 80, Ukrainian officials said.

The air assault killed at least three people. Kharkiv’s mayor described it as “the most powerful attack” since the beginning of the war.

Russian President Vladimir Putin told Donald Trump in a telephone conversation on Wednesday that Moscow would have to respond to the recent Ukrainian drone attacks, the U.S. President said.Trump said the two men "discussed the attack on Russia’s docked airplanes,