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.

In addition to the 479 drones, 20 missiles of various types were fired at different parts of Ukraine from Sunday to Monday, according to the air force, which said the barrage targeted mainly central and western areas.