Russia again unleashed missiles on Thursday against Ukrainian energy facilities, while its forces stepped up attacks in eastern Ukraine, reinforced by troops pulled from Kherson city in the south which Kyiv recaptured last week.

Nato and Poland concluded that a missile that crashed in Poland on Tuesday, killing two people, was probably a stray fired by Ukraine’s air defences and not Russian.

Ukrainian President Volodymyr Zelensky contested this view in a rare public disagreement with his western allies.

As the winter’s first snow fell in Kyiv, authorities said they were working hard to restore power nationwide after Russia earlier this week unleashed what Ukraine said was the heaviest bombardment of the civilian infrastructure of the nine-month war. Explosions resounded in cities including Odessa, Kyiv, the central city of Dnipro and the southeastern region of Zaporizhzhia.

“Missiles are flying over Kyiv right now,” Interfax quoted Prime Minister Denys Shmyhal as saying.

Zelensky posted video footage, apparently shot from a car cam, showing a driver’s journey through Dnipro being interrupted by a huge blast ahead.