Russia launched another vast attack on ​Ukraine’s energy system, rocking Kyiv with explosions overnight and into Saturday morning, leaving 1.2 million properties without power countrywide during sub-zero winter cold.

Deputy Prime Minister Oleksiy Kuleba said more than 3,200 buildings in the capital remained without heating in the late evening, down from 6,000 in the morning. Night-time temperatures were hovering around -10 degrees Celsius .

More than 160 emergency crews were operating in the capital to restore heating, he said. Crews were also at work in other affected areas, mainly in western and southern Ukraine.

Energy Minister Denys Shmyhal, writing on Telegram after the daily meeting of officials devoted to energy, said more than 800,000 Kyiv households were still without power ‌as were a further ‌400,000 in Chernihiv region, north of the capital.

“As for power, ‌constant ⁠enemy ​attacks unfortunately ‌keep the situation from being stabilized,” he wrote.