Russia launched waves of drones and ballistic missiles at multiple targets across a broad swath of Ukraine early Friday, killing at least four people in the capital and wounding around 40 across the country.

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 co-ordinated attacks of the three-year war.

The Russian attacks come after President Donald Trump likened the two sides to children on a playground who needed “to fight for a while.”