A nighttime missile and drone attack on Ukraine killed at least four people and injured 20 others in Kyiv, city mayor Vitali Klitschko said Friday, as Russia targeted at least six regions across the country with 407 drones and 44 missiles in one of its largest coordinated attacks of the three-year war.

Sharing further details of the large-scale assault, Ukrainian officials said that cruise missiles and hundreds of drones were launched targeting Kyiv, Chernihiv, Lutsk and Ternopil.