Ukrainian President Volodymyr Zelenskiy said the territorial dispute was a central issue for the tripartite talks, including Russian, Ukrainian and US officials, which were scheduled to conclude on Saturday.

He said in a statement on the Telegram app that it was too early to draw conclusions from Friday's talks. He also said on Friday that a deal on US security guarantees for Ukraine was ready, and that he was only waiting on President Donald  Trump for a specific date and place to sign it.

Rustem Umerov, the head of the Ukrainian delegation, said in a statement the talks had discussed parameters for ending the conflict and the "further logic of the negotiation process."