A combined Russian missile and drone attack on Ukraine overnight killed at least 15 people — including an American citizen — and wounded scores of others, according to Ukrainian officials.

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

Waves of Russian drones and missiles struck districts across the Ukrainian capital Kyiv early on Tuesday, damaging an apartment building, sparking fires and injuring up to 16 people, city officials said.