Ukraine says it was struck by a new barrage of deadly Russian air attacks as an Easter ceasefire ended and as the US pushes for a deal between Moscow and Kyiv to end the three-year-long conflict.

In addition to 42 Shahed drones and other UAVs shot down across eastern, northern, southern and central Ukraine, air defenses managed to neutralize 47 more drones through electronic warfare, the military said.

Ukraine's skies were pierced by the wail of sirens on Monday morning, marking the end of a brief Easter peace and the return of relentless conflict.