Ukraine's southern port city of Odesa and surrounding areas experienced widespread blackouts on Saturday following a massive overnight Russian assault involving hundreds of drones and missiles targeting the energy infrastructure.
More than a million households across the country lost power, with the southern regions bearing the heaviest impact.
Ukrainian officials reported no fatalities from the latest strikes, though five people were wounded nationwide.
Hospitals and public water stations in affected areas switched to generator power, while non-drinking water supplies were delivered to parts of Odesa.
President Volodymyr Zelenskiy described the attack as focusing primarily on the energy system, particularly the south and Odesa region.
He stated that Russia deployed over 450 drones and 30 missiles.
Prime Minister Yulia Svyrydenko called it one of the largest assaults on Odesa during the war, resulting in disruptions to electricity and water supplies.
The power grid operator noted significant outages in Odesa and Mykolaiv regions, with the Ukrainian-controlled portion of Kherson region completely without electricity.
Russia's defense ministry confirmed strikes on Ukrainian energy and military-industrial facilities.
The bombardment occurred during intensified international efforts to negotiate an end to the nearly four-year war or secure a limited cease-fire.
Ukrainian, European, and American officials have engaged in recent talks driven by a U.S. initiative to resolve the conflict swiftly.
President Trump has urged President Zelenskiy to accept a deal involving territorial concessions, arguing Ukraine is losing ground.
Zelenskiy and European allies have resisted while seeking continued U.S. support.
Upcoming meetings include discussions among negotiators from Europe, the United States, and Ukraine in Berlin, followed by talks involving Zelenskiy and European leaders.
Russian President Vladimir Putin has displayed limited interest in a peace agreement at this stage.
A recent conversation between Putin and Turkish President Recep Tayyip Erdogan explored a potential cease-fire for energy facilities and ports, but Russia has opposed such proposals.
Hours after that discussion, strikes hit two Ukrainian ports in the Odesa region, damaging three Turkish-owned vessels.