Russia hits second major bridge in Ukraine's capital Kyiv

Writing on Telegram on Saturday, Klitschko said: "Hitting the North Bridge. Emergency services are on their way."

"Traffic on the bridge from the left to the right bank is currently blocked," he added.

Earlier attacks on the Southern Bridge prompted Kyiv's defence council to hold a crisis meeting on Friday, in which Klitschko warned that intensified Russian drone and missile strikes were "tearing Kyiv apart".

He said the city was now in a "very dramatic situation" as Moscow was battering its "critical infrastructure, logistics, housing" and other key facilities.

Russian President Vladimir Putin has said Russia is acting in response to Ukraine's strikes on Russian energy facilities, despite the fact that it was Moscow that had first launched such attacks.