President Donald Trump said he was “not happy” with Russian President Vladimir Putin, as his administration presses forward with its campaign to persuade Russia and Ukraine to accept a U.S. ceasefire proposal.

Trump condemned Putin for launching an attack on Kyiv early Thursday, which killed at least eight people, urging the foreign leader to agree to a peace deal to end the three-year conflict in Ukraine that his country started. The Trump administration recently put forward a ceasefire plan that would involve a “freeze” of most territorial lines, Vice President JD Vance said Wednesday, and reports of ceding to Russia’s annexation of Crimea. Ukrainian officials have previously dismissed calls to compromise on territorial integrity.

“I am not happy with the Russian strikes on KYIV,” Trump wrote in a post to Truth Social on Thursday. “Not necessary, and very bad timing. Vladimir, STOP! 5000 soldiers a week are dying. Lets get the Peace Deal DONE!”

Trump’s chiding of Putin is a change from his usual targeting of Ukrainian President Volodymyr Zelenskyy, who has been the main outlet for Trump’s frustration over the war. The leaders’ tensions culminated in public sparring in the Oval Office earlier this year. But in recent weeks, Trump has sometimes placed blame on both foreign leaders.

On Wednesday, Trump bashed Zelenskyy, suggesting Ukraine hadn’t tried hard enough to take control of Russian-occupied Crimea.

“Nobody is asking Zelenskyy to recognize Crimea as Russian Territory but, if he wants Crimea, why didn’t they fight for it eleven years ago when it was handed over to Russia without a shot being fired?” Trump wrote on Truth Social on Wednesday.

Trump’s remarks also follow increased threats from the president and other administration officials to abandon ceasefire negotiations if Russia and Ukraine don’t come to the table soon. Secretary of State Marco Rubio and special envoy Steve Witkoff pulled out of a meeting with European allies Wednesday to discuss proposals to end the war.

Trump, who pledged to end the war in “24 hours” on the campaign trail if elected, has struggled to broker a deal to end the war as Russia restarted its offensive earlier this month.