Ukrainian President Zelensky insists territorial issues must be discussed only among leaders. Zelensky shared his views on social media after a joint television broadcast.
Technical teams must deliver concrete results before trilateral talks resume next month.
An energy ceasefire would be an important step toward ending the fighting. He stressed that strong security guarantees and Ukraine's neutrality remain essential today.
He called territory a red line, discussable only between national leaders today. A temporary humanitarian truce in Oleshky will allow aid convoys entry soon.