The warring sides also exchanged prisoners in one of the few results of talks last week, and Russia reported new attacks on the front line.

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.

Electronic warfare systems disabled an additional 187 drones and missiles by jamming or disrupting their guidance, preventing them from reaching their intended targets. Ukraine's air force said its air defense units responded quickly with intercepts and tracking systems.