Russia launched an overnight barrage of drones and cruise and ballistic missiles at Kyiv, officials said Monday, as children prepared their return to school across the country after the summer vacation and some found classes canceled due to damage from the attack.

Several series of explosions rocked the Ukrainian capital in the early hours. Debris from intercepted missiles and drones fell in every district of Kyiv, injuring three people and damaging two kindergartens, Ukraine’s Interior Ministry said. City authorities reported multiple fires. Russian President Vladimir Putin said Monday that Ukraine’s Kursk assault will not prevent Russian forces from advancing in eastern Ukraine. Ukrainian forces have not achieved their goal of diverting Russian troops from the fighting there, he said.