The U.S. proposals to end the war in Ukraine may include a number of elements based on Ukrainian perspectives and critical for Ukrainian national interests, President Volodymyr Zelenskyy said on Sunday.

"There have already been brief reports from our delegation members about the outcomes of their first meetings and talks," Zelenskyy said on X, commenting on the talks with EU and U.S. teams in Geneva.

"Further work is ongoing to make all elements truly effective in achieving the main goal anticipated by our people: to finally put an end to the bloodshed and war," he added. 

"Ukraine is thankful to the United States, to every American heart and particularly to President Trump for the help which, starting with Javelin (missiles), saves Ukrainian lives," Zelenskyy wrote on Telegram after Trump said Ukraine's leaders had expressed "zero gratitude" for U.S. assistance.

Zelenskyy also expressed thanks to Europe and the G7 and G20 groupings of countries for their help, saying efforts to maintain this support were important.

"This is why we are working so carefully on every point, every step towards peace," he wrote. "Everything has to be worked out correctly so that we can truly end this war and prevent war from happening again."