Power cuts were reported in the western Ukrainian city of Lviv on Monday following an explosion "at a critical infrastructure facility," Lviv Mayor Andriy Sadovyi posted on Telegram.
"Part of the city is without electricity. A third of the traffic lights do not work," Sadovyi wrote. "Due to the lack of electricity, the operation of the city's thermal power stations has been temporarily suspended. Therefore, hot water is not provided at the moment."
Standby power generators at several pumping stations were started to restore the water supply, he added.
Sadovyi urged residents to stay in shelters.
The wave of missile and rocket attacks Monday across Ukraine appears to have been in part directed at power plants, bridges and other civilian infrastructure. In addition to Lviv, attacks were reported in Kyiv, Kharkiv, Mykolaiv and Dnipropetrovsk.