U.S. President Donald Trump said on Sunday that he and Ukrainian President Volodymyr Zelenskiy were "getting a lot closer, maybe very close" to an agreement to end the war in Ukraine, though both leaders acknowledged that some of the thorniest details remain unresolved.

The two leaders spoke at a joint press conference late Sunday afternoon after meeting at Trump's Mar-a-Lago resort in Florida. Trump said it will be clear "in a few weeks" whether negotiations to end the war will succeed.

Zelenskiy said an agreement on security guarantees for Ukraine has been reached. Trump was slightly more cautious, saying that they were 95% of the way to such an agreement, and that he expected European countries to "take over a big part" of that effort with U.S. backing.

Zelenskiy has said previously that he hopes to soften a U.S. proposal for Ukrainian forces to withdraw completely from the Donbas region of eastern Ukraine, a Russian demand that would mean ceding some territory held by Ukrainian forces.

Both Trump and Zelenskiy said on Sunday the future of the Donbas had not been settled. "It's unresolved, but it's getting a lot closer. That's a very tough issue," Trump said.

Just before Zelenskiy and his delegation arrived at Trump's Florida residence, Trump and Russian President Vladimir Putin spoke in a call described as "productive" by the U.S. president and "friendly" by Kremlin foreign policy aide Yuri Ushakov.

Ushakov, in Moscow, said Putin told Trump a 60-day ceasefire proposed by the European Union and Ukraine would prolong the war. The Kremlin aide also said Ukraine needs to make a decision regarding the Donbas "without further delay." And he said the Russian government had agreed to establish working groups to resolve the conflict that will focus on economic and security concerns.

Zelenskiy arrived at Mar-a-Lago early Sunday afternoon, as Russian air raids pile pressure on Kyiv. Russia hit the capital and other parts of Ukraine with hundreds of missiles and drones on Saturday, knocking out power and heat in parts of Kyiv. Zelenskiy has described the weekend attacks as Russia's response to the U.S.-brokered peace efforts, but Trump on Sunday said he believes Putin and Zelenskiy are serious about peace.

The U.S. president said he will call Putin again after meeting with Zelenskiy. Zelenskiy had previously told journalists he plans to discuss the fate of the contested Donbas region with Trump, as well as the future of the Zaporizhzhia nuclear power plant and other
topics.

Putin said on Saturday Moscow would continue waging its war if Kyiv did not seek a quick peace. Russia has steadily advanced on
the battlefield in recent months, claiming control over several more settlements on Sunday.

While Kyiv and Washington have agreed on many issues, the issue of what territory, if any, will be ceded to Russia remains unresolved. While Moscow insists on getting all of the Donbas, Kyiv wants the map frozen at current battle lines.

The U.S., seeking a compromise, has proposed a free economic zone if Ukraine leaves the area, although it remains unclear how
that zone would function in practical terms.

U.S. negotiators have also proposed shared control over the Zaporizhzhia nuclear plant. Power line repairs have begun there
after another local ceasefire brokered by the International Atomic Energy Agency, the agency said on Sunday.

Russia controls all of Crimea, which it annexed in 2014, and since its invasion of Ukraine nearly four years ago has taken control of about 12% of its territory, including about 90% of the Donbas, 75% of the Zaporizhzhia and Kherson regions, and slivers of the Kharkiv, Sumy, Mykolaiv and Dnipropetrovsk regions, according to Russian estimates.

Putin said on December 19 that a peace deal should be based on conditions he set out in 2024: Ukraine withdrawing from all
of the Donbas, Zaporizhzhia and Kherson regions, and Kyiv officially renouncing its aim to join NATO. Zelenskiy's past encounters with Trump have not always gone smoothly, but Sunday's meeting follows weeks of diplomatic efforts. European allies, while at times cut out of the loop, have stepped up efforts to sketch out the contours of a post-war security guarantee for Kyiv that the United States would support.

On Sunday, ahead of the Mar-a-Lago visit, Zelenskiy said he held a detailed phone call with British Prime Minister Keir Starmer. Trump and Zelenskiy will hold a phone call with European leaders at some point during the Florida meeting, Trump said.

The 20-point plan was spun off from a Russian-led 28-point plan, which emerged from talks between U.S. special envoy Steve Witkoff, Trump's son-in-law Jared Kushner and Russian special envoy Kirill Dmitriev, and which became public in November.

Subsequent talks between Ukrainian officials and U.S. negotiators have produced the more Kyiv-friendly 20-point plan.