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, Reuters reported. 

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, according to Reuters.