“What’s needed is not window dressing but decisive action – from the United States, Europe and the G7 – in delivering air defence systems and enforcing sanctions,” he wrote in a post on X.
He said that 450 drones and more than 30 missiles targeted Ukraine’s energy infrastructure, describing such attacks as “cynical and calculated” and against “everything that sustains normal life” as temperatures become colder.
Ukraine’s Energy Minister Svitlana Hrynchuk said Russia was “inflicting a massive strike” and repair crews were working to restore power.
A wave of strikes hit energy infrastructure and apartment buildings in Kyiv.
Five out of the nine people injured in the strikes on the capital have been taken to hospital, Klitschko said.
Images of firefighters putting out blazes at a 10-storey building have been released by Ukraine’s state emergency services.