WASHINGTON (AP) — President Donald Trump said Friday that the leaders of Russia and Ukraine have agreed to his request for a three-day ceasefire and an exchange of prisoners, adding that such a halt to hostilities could be the “beginning of the end” of the long war between them.

Ukrainian President Volodymyr Zelenskyy confirmed the agreement. There was no immediate comment from Russian President Vladimir Putin or the Kremlin.

Trump announced on social media that the ceasefire would run Saturday through Monday. Saturday is Victory Day in Russia, a holiday that commemorates victory over Nazi Germany in World War II.

“I am pleased to announce that there will be a THREE DAY CEASEFIRE (May 9th, 10th, and 11th) in the War between Russia and Ukraine,” Trump wrote. “The Celebration in Russia is for Victory Day but, likewise, in Ukraine, because they were also a big part and factor of World War II.”

The Republican president said the ceasefire includes a suspension of all kinetic activity and the exchange of 1,000 prisoners by each country.

Russia had announced a ceasefire for Friday and Saturday, but it quickly unraveled, with both sides blaming the other for the continued fighting, just as they had when Ukraine’s own unilateral ceasefire had swiftly collapsed earlier in the week.

Trump said he made his request for the ceasefire “directly” to the two presidents. “Hopefully, it is the beginning of the end of a very long, deadly, and hard fought War," he said.

Trump added that talks continue over ending the war that began in February 2022 “and we are getting closer and closer every day.” Trump has gone back and forth over whether the war will end, at times expressing optimism and at other times saying Russia and Ukraine should be left to fight it out to the bitter end.

Zelenskyy said Ukraine’s decision on how to engage with those discussions was shaped in part by the prospect of freeing its prisoners. Ukraine has made the return of prisoners of war a central demand throughout the conflict.

“Red Square matters less to us than the lives of Ukrainian prisoners of war who can be brought home,” Zelenskyy wrote on Telegram. Red Square is where Russia holds its traditional military parade to celebrate Victory Day, one of the biggest holidays of the year.

After releasing his statement, Zelenskyy issued a formal presidential decree “authorizing” Russia to hold the parade, declaring Red Square off-limits for Ukrainian strikes for the duration of the event. The framing of the decree appeared designed to underscore Kyiv’s claim that it holds effective targeting reach over the Russian capital, while publicly tying Ukrainian restraint to the ceasefire terms.

Zelenskyy said the deal was reached through a U.S.-mediated process and thanked Trump and the American team for what he called effective diplomatic engagement. He said Ukraine expected Washington to hold Russia to the terms of the agreement.

“We are counting on the United States to ensure that Russia fulfills its commitments,” Zelenskyy said.

Zelenskyy said he had instructed his team to prepare everything necessary for the exchange without delay.

Trump's announcement came hours after Secretary of State Marco Rubio struck a much more somber tone about negotiations to halt Russia’s 4-year-old war in Ukraine, saying U.S. mediation efforts have not led to a “fruitful outcome” so far.

“While we’re prepared to play whatever role we can to bring it to a peaceful diplomatic resolution, unfortunately right now, those efforts have stagnated,” Rubio told reporters at the end of a visit to Rome and the Vatican. “But we always stand ready if those circumstances change.”

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Associated Press writers Hanna Arhirova in Kyiv and Giada Zampano in Rome contributed to this report.