The attack used almost 500 drones and missiles, breaking a record set just days earlier, as Russia tries to overwhelm Ukraine’s air defenses, which shot down most of the weapons.

Families in Ukrainian cities are taking refuge from massive swarms of Russian drones, as Moscow steps up its airborne assault with attacks designed to undermine Ukrainian morale.

Russia unleashed its largest overnight drone attack of the war on Monday, launching cruise and ballistic missiles in a barrage that lasted all night and struck locations across Ukraine, even as Kyiv and Moscow began a days-long prisoner exchange involving hundreds of soldiers.