Ukraine President Volodymyr Zelenskyy said on his Telegram channel that four civilians were killed and 92 injured in the capital, Kyiv, and in northeastern Kharkiv as hypersonic Kinzhal missiles that can fly at 10 times the speed of sound slammed into city blocks.

Russia fired almost 100 missiles of various types, Zelenskyy said on X, formerly Twitter. He claimed that at least 70 missiles were shot down, almost all of them in the Kyiv area, and said Western-supplied air defense systems such as Patriots and NASAMS had saved hundreds of lives.

He said Russia had launched about 170 "Shahed" attack drones and dozens of different missiles at Ukraine since Dec. 31.

"For the third day already, our air defenders are doing incredible work," Zelenskyy said on Telegram messenger.

"I thank all partners who help to strengthen our air shield. And it's obvious it helps save hundreds of lives every day and every night that would have been taken by Russian terror if it weren't for Patriots and other defense systems."