President Volodymyr Zelenskyy said Monday that Kyiv was working with partners "to look for compromises that strengthen, but not weaken us."

There was optimism following the talks in Geneva, but no details emerged on how to bridge the huge divide between Moscow and Kyiv over territory and security guarantees.

Polish Prime Minister Donald Tusk said “it would be good to know for sure who is the author of the plan,” as tensions over elements that mirror long-standing Russian demands.

U.S., Ukrainian and European officials gathered in Switzerland on Sunday for talks on the contentious American-Russian peace plan put to Kyiv this week.