Washington has offered new security guarantees for Ukraine but gaps still remain over territory.

US and Ukrainian officials are expected to meet for a second day of talks in Berlin on December 15 as Washington pushes for an agreement to end Russia's war on Ukraine and Kyiv struggles to avoid a deal that would favor Moscow.

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.

President Donald Trump has directed U.S. officials to help to facilitate a “lasting and durable peace" between Ukraine and Russia, with a "very, very strong" package being presented.