President Volodymyr Zelenskyy offered to drop Ukraine's aspirations to join the NATO military alliance as he held five hours of talks with U.S. envoys in Berlin on Sunday to end the war with Russia, with negotiations set to continue on Monday.

Steve Witkoff, President Trump’s envoy, said “significant progress” had been made during discussions he attended alongside Trump’s son-in-law, Jared Kushner.

The talks mark the latest diplomatic effort to resolve Europe’s deadliest conflict since the Second World War, though few details have been made public.

Zelenskyy’s adviser, Dmytro Lytvyn, said the Ukrainian president would comment once the talks conclude, adding that officials are reviewing draft documents.

“The discussions lasted more than five hours and concluded today with an agreement to resume tomorrow morning,” Lytvyn said in a WhatsApp message to reporters.

Ahead of the talks, President Volodymyr Zelenskyy said Ukraine could drop its bid to join NATO in exchange for firm Western security guarantees — a significant shift for Kyiv, which has enshrined NATO membership in its constitution as protection against Russian aggression.

Witkoff said representatives held “in-depth discussions” on a proposed 20-point peace framework, economic issues and other matters, confirming that negotiations would resume on Monday morning.

The meeting was hosted by German Chancellor Friedrich Merz, who made brief opening remarks before leaving delegations to negotiate. Other European leaders are expected in Germany for further discussions.

“From the outset, Ukraine sought NATO membership as the most reliable form of security,” Zelenskyy said in a written response to reporters. “Some partners in the U.S. and Europe did not support this path.”

He said alternatives under discussion include bilateral security guarantees from the United States, NATO Article 5-style commitments, and additional guarantees from European partners, as well as countries such as Canada and Japan.

Russia has repeatedly demanded that Ukraine formally renounce NATO membership and withdraw forces from parts of eastern Ukraine still under Kyiv’s control. Moscow has also insisted that Ukraine remain neutral and that no NATO troops be stationed on its territory.

Washington’s decision to send Witkoff closely involved in talks with both Kyiv and Moscow was widely seen as a sign the U.S. believes progress may be possible nearly four years after Russia’s 2022 invasion.

Meanwhile, speaking in Brussels, EU foreign affairs chief Kaja Kallas said Ukraine needs “real troops and real capabilities” to defend itself.

She rejected suggestions that the Donbas region could serve as a buffer zone or be ceded to Russia, warning that the area is not Moscow’s final objective.

Kallas said robust security guarantees are essential to prevent Russia from seizing more Ukrainian territory in the future.

Another key issue under discussion in Brussels is continued financial support for Ukraine.

EU ministers are debating whether to reach consensus this week on using around $240 billion in frozen Russian assets to finance reparations loans and support Ukraine’s war effort.

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