An overnight Russian missile and drone bombardment of Ukraine killed 15 people and injured 156, local officials said Tuesday, with the main barrage demolishing a nine-story Kyiv apartment building in the deadliest attack on the capital this year.

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.