“As of this moment, there have been three explosions at two energy facilities in the Lviv region,” governor Maxim Kozitsky said on Telegram.

Lviv mayor Andriy Sadovyi said there was a strike on the region’s main city, also called Lviv.

He added that about a third of the city was without power and water supplies were disrupted in two districts.

Mass retaliatory strikes hit Ukraine nationwide yesterday, after Moscow blamed Kyiv for a blast on a bridge connecting Russia to Crimea, a peninsula Moscow annexed from Ukraine in 2014.

Ukraine said Russian forces had fired more than 80 missiles at cities across the country – including the capital Kyiv – damaging energy facilities in particular.

According to Ukraine’s emergency services, more than 300 localities were without power across the county following the attacks.