Russia’s foreign minister rejected ideas floated by members of the Trump transition team for negotiating a ceasefire in Ukraine, casting doubt that the president-elect will be able to negotiate a peace deal in his first 24 hours—as he repeatedly claimed on the campaign trail.

Russian Foreign Minister Sergey Lavrov rejected proposals Monday floated by President-elect Trump’s allies to end the war in Ukraine, dealing a major setback for the incoming president’s hopes to freeze the conflict.

Earlier reports from the Wall Street Journal indicated that Trump’s team is considering a plan to delay Ukraine’s NATO membership by at least 20 years in exchange for continued Western arms supplies and the deployment of European peacekeepers to monitor a ceasefire.

Trump has said he would end the war in Ukraine "within 24 hours" but Sergey Lavrov has poured cold water on plans to halt the fighting revealed in an interview.

In an interview with Russian state news agency TASS published Monday, Lavrov criticized what he said he understood Trump's plane to be. Here is how he phrased it, per an English t