President Donald Trump said Friday he wants an “immediate” ceasefire between Russia and Ukraine, and warned Ukrainian President Volodymyr Zelenskyy to make peace or lose American support.

“That was not a man that wanted to make peace,” Trump said of Zelenskyy, hours after the two had a contentious Oval Office meeting. He added, “I want a ceasefire now.”

Trump said he believes that Russian President Vladimir Putin, who launched the invasion of Ukraine three years ago, is ready for a peace deal.

Zelenskyy urged the U.S. administration to be more skeptical of the Russian leader’s intentions.