Russia and Ukraine on Sunday swapped hundreds of prisoners just hours after Moscow launched one of the largest aerial assaults of the more than three-year war between the two countries. 

The prisoner swap was the third and final part of a major exchange, marking a rare moment of cooperation. 

Russia’s Defense Ministry said both sides exchanged more than 300 soldiers. This followed the release of 307 combatants and civilians each on Saturday, and 390 on Friday — the largest total swap of the war so far.

“303 Ukrainian defenders are home,” Ukraine’s President Volodymyr Zelenskyy wrote on X, confirming the exchange. 

“I’m not happy with what Putin is doing,” Trump said. “He’s killing a lot of people, and I don’t know what the hell happened to Putin.” 

Later expanding on his comments in a Truth Social Post, Trump said Putin had “gone absolutely CRAZY!” 

In this pool photograph distributed by the Russian state agency Sputnik, Russia’s President Vladimir Putin chairs a Security Council meeting via videoconference at the Kremlin in Moscow on March 28, 2025. (SERGEI ILYIN/POOL/AFP via Getty Images)

“I’ve always said that [Putin] wants ALL of Ukraine, not just a piece of it, and maybe that’s proving to be right, but if he does, it will lead to the downfall of Russia!” the social media post read. But the president also criticized Zelenskyy.   

“Likewise, President Zelenskyy is doing his Country no favors by talking the way he does. Everything out of his mouth causes problems, I don’t like it, and it better stop,” Trump wrote, concluding: “This is a War that would never have started if I were President. This is Zelenskyy’s, Putin’s, and Biden’s War, not ‘Trump’s,’ I am only helping to put out the big and ugly fires, that have been started through Gross Incompetence and Hatred.” 

Fox News Digital’s Andrea Margolis and The Associated Press contributed to this report.