Overnight, air sirens were heard sounding in several other Ukrainian regions, including the capital Kyiv. It was not immediately clear whether there were any casualties. The Russian military has not commented on the issue. In his video address late on Friday, Ukrainian President Volodymyr Zelensky again accused Russia of targeting Ukrainian energy infrastructure - in violation of a temporary moratorium agreed earlier this month in talks involving the US. Moscow has also repeatedly blamed Ukraine for attacking Russia's energy sector. Russian President Vladimir Putin earlier this week suggested that Ukraine should temporarily be placed under UN control to elect what he called a more "competent" government.

With the United States set to meet delegations from Russia Ukraine separately in Saudi Arabia on Monday in an ongoing bid to halt the three-year war, Russia has launched a drone attack on Friday night on the Ukrainian city of Zaporizhzhia, killing three people and wounding 12, Ukrainian officials said. The city was hit by 12 drones, police said. Regional Governor Ivan Fedorov said residential buildings, cars and communal buildings were set on fire. Photos from the scene showed emergency services scouring the rubble for survivors. Ukraine and Russia agreed this week in principle to a limited ceasefire after US President Donald Trump held separate calls on consecutive days with the countries' leaders, but what actual targets would be off limits to attack remains contentious.