(Reuters) – Russian attacks on Thursday temporarily suspended power supply for at least 70,000 consumers in Ukraine’s northern Chernihiv region, officials said, as Moscow’s troops renew their air strikes on shattered energy infrastructure ahead of the winter.

About 29,000 consumers faced power cuts in Chernihiv and the surrounding district, as well as 43,000 in the town of Nizhyn, the regional power distribution operator said on the Telegram messenger.

Works to restore electricity supplies were underway, it added.

Overnight, Russian troops targeted energy facilities in Vinnytsia, disrupting power flows for parts of the central city and causing fires.

Throughout more than three-and-a-half years of full-scale invasion, Russia repeatedly targeted Ukraine’s energy system ahead of the cold autumn and winter months, and it has stepped up such strikes in recent weeks.

Russian troops also unleashed “systematic” attacks on Ukraine’s railway since this summer, the company’s CEO said.