Kyiv, Ukraine — Russia bombarded six regions of Ukraine in one of its largest aerial attacks of the three-year war, Ukrainian officials said Friday. The nighttime assault lasted for hours and killed three emergency responders in the capital Kyiv, according to authorities.

Ukrainian forces struck multiple Russian airfields and military facilities overnight on June 6, hours before Russia launched one of its heaviest aerial assaults of the war, the General Staff of Ukraine's Armed Forces reported.

Russia launched a barrage of drones and ballistic missiles across broad swaths of Ukraine early Friday, killing at least four people and injuring dozens of others, days after Kyiv launched a daring raid on Moscow’s fleet of strategic bombers.