Ukraine war latest updates: Putin hails military gains in Ukraine; Blinken warns of 'real problem' if Kyiv gets no extra funding

This is CNBC's live blog tracking developments on the war in Ukraine. See below for the latest updates. 

The war in Ukraine is dominating conversations at the World Economic Forum in Davos this week, with Ukraine's President Volodymyr Zelenskyy making the most of the opportunity to address the global business and political elite.

Zelenskyy told delegates that his Russian counterpart, Vladimir Putin, had "stolen" years of peace and threatened the wider world if he was allowed to succeed in his invasion of Ukraine.

U.S. Secretary of State Antony Blinken met Zelenskyy at Davos on Tuesday and, speaking to CNBC later, said there would be a "real problem" if Congress did not approve additional (and contentious) funding for Ukraine.

In other news, Putin said Tuesday it was "impossible" to take away from Russia the military gains it had made in Ukraine.

Talking about possible peace talks, Putin said ideas put forward by Ukraine were "prohibitive formulas for the peace process." When asked to comment on Sunday's talks, the Kremlin's Press Secretary Dmitry Peskov told CNBC, "We find these negotiations strange without our participation. They have no prospects for success."

Poland's President Andrzej Duda told CNBC Tuesday that Ukraine's refusal to cede ground to Russia in prospective peace talks was "perfectly understandable."

The chief of the European Union's executive Commission, Ursula von der Leyen, on Wednesday said she was "confident" all 27 member states will find a solution to provide funds to Ukraine, an issue currently in gridlock over Hungary's resistance.

Von der Leyen spoke to lawmakers in the EU parliament after EU leaders last month had agreed to start accession talks with Ukraine but failed to green-light a financial