US special envoy Steve Witkoff said Sunday that three days of negotiations in Florida with Ukrainian and European officials to end the war in Ukraine were "productive and constructive," though no breakthrough was announced and fighting continued on the ground.

The talks in Miami were part of the Trump administration's month-long push to broker a peace deal between Russia and Ukraine. President Donald Trump has pressed both sides to reach an agreement on ending the nearly four-year-old conflict as soon as possible.

"Over the last three days in Florida, the Ukrainian delegation held a series of productive and constructive meetings with American and European partners," Witkoff wrote on social media.

He said the discussions focused on "a shared strategic approach between Ukraine, the United States and Europe."

Witkoff was joined by Trump's son-in-law Jared Kushner and White House staff member Josh Gruenbaum. Ukraine's delegation was led by Rustem Umerov, secretary of the National Security and Defense Council of Ukraine, and Lieutenant General Andriy Hnatov, Chief of the General Staff of the Armed Forces of Ukraine.

Key European national security advisers also participated in the negotiations.

Scope of the discussions

Witkoff said the talks centered on four key areas: further development of the US 20-point plan, a multilateral security guarantee framework, a US security guarantee framework for Ukraine, and an economic development plan for Ukraine's recovery.

Negotiators focused particularly on "timelines" and the "sequencing of next steps," according to Witkoff.

"Our shared priority is to stop the killing, ensure guaranteed security, and create conditions for Ukraine's recovery, stability, and long-term prosperity," Witkoff said. "Peace must be not only a cessation of hostilities, but also a dignified foundation for a stable future."

In a separate statement, Witkoff said Ukraine "remains fully committed to achieving a just and sustainable peace."

The Miami meetings were the latest in a series of talks between the United States, Russia and Ukraine on a US-drafted 20-point plan to end the war. US, Ukrainian and European officials earlier this week reported progress on security guarantees for Kyiv, though it remains unclear whether those terms will be acceptable to Moscow.

Parallel talks with Russia

The American delegation also met separately with Russian officials during the weekend. Kremlin envoy Kirill Dmitriev held discussions with Witkoff and Kushner on Saturday.

"The discussions are proceeding constructively. They began earlier and will continue today, and will also continue tomorrow," Dmitriev told reporters in Miami on Saturday.

In a separate social media post, Witkoff said his meetings with the Russian delegation were also "productive and constructive."

"Russia remains fully committed to achieving peace in Ukraine," Witkoff said. "Russia highly values the efforts and support of the United States to resolve the Ukrainian conflict and re-establish global security."

Ukrainian President Volodymyr Zelenskyy wrote on Telegram that diplomatic efforts were "moving forward quite quickly, and our team in Florida has been working with the American side."

The Kremlin, however, denied that trilateral talks involving Ukraine, Russia and the United States were under discussion, after Zelenskyy said Washington had proposed the idea of three-way negotiations.

"At present, no one has seriously discussed this initiative, and to my knowledge it is not being prepared," said Yuri Ushakov, Putin's foreign policy adviser, according to Russian state news agencies.

Kremlin criticism of European proposals

Ushakov said on Sunday that changes made by European countries and Ukraine to the US proposals do not improve the prospects for peace.

"I am sure that the proposals that the Europeans and Ukrainians have made or are trying to make definitely do not improve the document and do not improve the possibility of achieving long-term peace," Ushakov was quoted as saying by Russian news agencies.

The US-drafted proposals for ending the war, leaked to media last month, raised European and Ukrainian concerns that they favor Moscow's wartime demands and could push Kyiv into conceding too much.

Since then, European and Ukrainian negotiators have met with Trump's envoys to add their own proposals to the US draft, though the exact contents of the amended proposal have not been publicly disclosed.

Russia has accused European leaders of attempting to hinder the peace talks with conditions unacceptable to Moscow. Ukraine and Europe have said Russia cannot be allowed to succeed in what they describe as an imperial-style land grab.

Russia wants to keep the Ukrainian areas it has seized, while Kyiv has refused to cede ground. The fundamental disagreement over territory remains a central obstacle to any deal.

Fighting continues amid negotiations

Despite the optimism expressed in Florida, fighting continued in Ukraine over the weekend.

A Russian missile strike in the port city of Odessa killed eight people and wounded 27 others on Saturday, according to Ukraine's emergency services.

The Ukrainian army was battling an attempted Russian breakthrough in the Sumy region on Sunday, the Ukrainian military said, following reports that Moscow forcibly moved 50 people from a border village there.

"Fighting is currently ongoing in the village of Hrabovske," Ukraine's joint task force said, adding troops were "making efforts to drive the occupiers back into Russian territory."

Zelenskyy said that over the week, "Russia has launched approximately 1,300 attack drones, nearly 1,200 guided aerial bombs, and nine missiles of various types" against Ukraine.

Russian President Vladimir Putin said Friday during his annual news conference that his forces were advancing and that he was confident Russia would achieve its goals in Ukraine. Putin claimed Ukraine was "retreating in all sectors" and that Russian troops were "advancing all across the line of contact."

Questions remain about Russian acceptance

Prior to the Miami meetings, US intelligence continued to indicate Putin has not abandoned his ambitions of taking over Ukrainian territory, according to six people familiar with the intelligence cited by Reuters.

Director of National Intelligence Tulsi Gabbard responded to that report on social media, saying US intelligence assessments have shown Russia "does not currently have the capability to conquer and occupy all of Ukraine, let alone Europe."

Senator Lindsey Graham of South Carolina, a Republican and close Trump ally, said on NBC's "Meet The Press" on Sunday that it remained unclear whether Putin would accept the current deal.

If Russia refuses, Graham said, the Trump administration should adopt an approach similar to its recent actions with oil tankers near Venezuela and "seize ships that are carrying sanctioned Russian oil."

A Russian refusal should also lead to designating "Russia a state sponsor of terrorism for kidnapping 20,000 Ukrainian kids," Graham said.

Kremlin envoy Dmitriev was scheduled to return to Moscow on Monday to report to Putin on the outcome of the talks.

"After that, we will formulate the position with which we will proceed, including in our contacts with the Americans," Ushakov said.