KYIV — A Russian missile attack on a nine-story corner apartment building in Kyiv's Darnytskyi district on Thursday killed 24 people, including three children. Emergency workers finished digging through the rubble after more than a day, and the city observed an official day of mourning on Friday.

The assault wounded 48 people in Kyiv, including two children. Ukraine's air force said the attack occurred during Russia's largest aerial assault on the country since the full-scale invasion began in 2022. The cruise missile that struck the apartment building was built in the second quarter of the current year.

"This means Russia is still importing the components, resources and equipment necessary for missile production in circumvention of global sanctions," Ukrainian President Volodymyr Zelenskyy said. "Stopping Russia's sanctions evasion schemes must be a genuine priority for all our partners."

Zelenskyy said more than 1,560 Russian drones had been launched against Ukrainian population centers since Wednesday, and that about 180 sites across Ukraine were damaged, including more than 50 residential buildings. He said the air defense interception rate of drones and missiles was over 93%. Air defense forces shot down or jammed 693 Russian targets overnight, including 41 missiles and 652 drones. Fifteen missiles and 23 drones scored direct hits across 24 locations, and debris from downed drones fell in another 18 locations.

Strikes on energy infrastructure left customers in Kyiv and 11 other regions temporarily without power, Ukrenergo said. Russian forces also bombarded the Ukrainian cities of Kremenchuk, Bila Tserkva, Kharkiv, Sumy, and Odesa. On Wednesday, a daytime attack on Kyiv killed at least six people, he said.

Russia's Defense Ministry said the strikes targeted Ukraine's military-industrial complex, including air bases and fuel and transport facilities, and claimed it hit all its targets. The ministry said the strikes involved Kinzhal missiles, which Moscow says can fly 10 times the speed of sound.

Putin suggested the war was nearing its end, and Kremlin spokesperson Dmitry Peskov echoed those comments. Zelenskyy dismissed the remarks, saying Moscow had no intention of ending the conflict. He said Russia was preparing strikes against more than 20 decision-making centers across Ukraine, including his office, his state residence, government buildings, and military command posts, and that he had discussed long-range strikes with senior military, security, and intelligence officials. He also said Russia was trying to draw Belarus deeper into the war and that strikes targeting Russia's oil industry and military production facilities are entirely justified.

British Defense Secretary John Healey called the Thursday attack on the Kyiv apartment building "shocking." He said he had accelerated U.K. deliveries of air defenses.

"Then the house shook violently and there was a loud bang, breaking the glass in my house," said Lyudmila Hlushko, 78, who lived near the struck building. Hlushko was among residents in the area affected by the strike on the nine-story building.