Officials say a Russian missile and drone bombardment has killed at least 15 people and injured 156 others in Ukraine overnight, with the main barrage demolishing a nine-story apartment building in Kyiv.

It was the deadliest attack on the Ukrainian capital in almost a year, and came as Moscow has intensified air assaults on the city.

A combined Russian missile and drone attack in Kyiv overnight Tuesday killed at least 14 people — including an American citizen — and wounded 44 others, according to Ukrainian officials.