A massive Russian attack hit Ukraine's energy infrastructure, prompting power cuts in several regions, Kyiv's energy minister said Saturday.

Moscow has in recent months escalated its attacks on energy infrastructure in Ukraine, damaging natural gas facilities which produce the main fuel for heating in the country.

Experts have said Ukraine risks heating outages ahead of the winter months.

"The enemy is massively attacking Ukraine's energy infrastructure again. Because of this, emergency power outages have been introduced in a number of regions of Ukraine," minister Svitlana Grynchuk wrote on social media, without specifying where.

"Emergency power outages will be canceled after the situation in the energy system stabilises," she said.

"Despite the enemy's plans, Ukraine will have light and heat this winter," Grynchuk added.

Russia has targeted Ukraine's power and heating grid throughout its almost four-year invasion, destroying a large part of the key civilian infrastructure.

Drones hit energy infrastructure Ukraine's southern Odesa late Friday evening, the region's governor Oleg Kiper said on Telegram.

"There was damage to an energy infrastructure facility," he said, reporting no dead or wounded.

Ukraine has in recent months stepped up strikes on Russian oil depots and refineries, seeking to cut off Moscow's vital energy exports and trigger fuel shortages across the country.