U.S. President Donald Trump on Sunday renewed accusations that Ukraine has shown “zero gratitude” for American support, as U.S. and Ukrainian officials met in Geneva to discuss Washington’s proposal to halt the war with Russia.

"UKRAINE 'LEADERSHIP' HAS EXPRESSED ZERO GRATITUDE FOR OUR EFFORTS," Trump wrote on his Truth Social platform, also blasting European countries for not doing enough to stop the war, but offering no direct condemnation of Moscow.

His comments came as U.S. Secretary of State Marco Rubio was meeting with top Ukrainian officials in a wintery Geneva Sunday to discuss the U.S. president's controversial 28-point plan for ending the nearly four-year conflict.

The Ukrainian delegation, headed by Andriy Yermak, also met with high-level officials from Britain, France and Germany in the Swiss city, as European countries scramble to have a seat at the table in the discussions.

Trump had given Ukraine until November 27 to approve the plan, but Kyiv wants changes to a draft that accepts a range of Russia's hardline demands, including requiring the invaded country to cede territory, cut its army and pledge never to join NATO.