Ukrainian President Volodymyr Zelenskyy urged the United Nations Security Council to act against Russia over air strikes on civilian infrastructure that have again plunged Ukrainian cities into darkness and cold as winter sets in.

Russia unleashed a missile barrage across Ukraine on Wednesday, killing 10 people, forcing shutdowns of nuclear power plants and cutting water and electricity supply in many places.

"Today is just one day, but we have received 70 missiles. That's the Russian formula of terror. This is all against our energy infrastructure. ... Hospitals, schools, transport, residential districts all suffered," Zelenskyy said via video link to the council chamber.