Britain, France and Germany have been working to refine US proposals for an end to the fighting with Russia, which in a draft disclosed last month called for Kyiv to cede more territory, abandon its NATO ambitions and accept limits on its armed forces.

The Ukrainian president is in Germany for the latest talks on ending the invasion of his country. US special envoy Witkoff is joining the negotiations, but Russia will not be represented.

Ukrainian President Volodymyr Zelenskyy and U.S. envoys are in Berlin for another round of talks intended to secure a deal to end the war.

Ukrainian President Volodymyr Zelenskyy and US envoys completed more than five hours of negotiations in Berlin on December 14 with no indication of potential results revealed, only that talks would continue the following day.

US and Ukrainian negotiators will again meet for high-stakes peace talks -- this time in Berlin -- as disagreements persist over territorial control and security guarantees and as Russia intensifies attacks on Ukrainian infrastructure sites.