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 massive overnight Russian strike on Kyiv, the Ukrainian capital, killed 14 people and wounded at least 177 others, Ukrainian officials said.