Fresh strikes have been reported in the Ukrainian capital city, Kyiv.
Kyiv’s mayor, Vitali Klitschko, said an infrastructure facility had been hit and explosions were reported elsewhere. He urged people to take shelter.
Earlier, an air-raid alert was issued across Ukraine amid reports of explosions in a number of locations.
In recent weeks, Russia has increased its attacks on Ukrainian energy networks after suffering a series of battlefield setbacks in the war.