KYIV, Ukraine (AP) — Ukrainian President Volodymyr Zelenskyy says proposals negotiated with U.S. officials on a peace deal to end his country’s nearly four-year war with Russia could be finalized within days, after which American envoys will present them to the Kremlin before further possible meetings in the United States next weekend.

Zelenskyy told reporters late Monday that a draft peace plan discussed with the U.S. during talks in Berlin earlier in the day is “very workable.” He cautioned, however, that some key issues — notably what happens to Ukrainian territory occupied by invading Russian forces — remain unresolved.

U.S-led peace efforts appear to be picking up momentum. But Russian President Vladimir Putin may balk at some of the proposals thrashed out by officials from Washington, Kyiv and Western Europe, including postwar security guarantees for Ukraine.

American officials on Monday said there’s consensus from Ukraine and Europe on about 90% of the U.S.-authored peace plan. U.S. President Donald Trump said: “I think we’re closer now than we have been, ever” to a peace settlement.

Plenty of potential pitfalls remain, however.

Zelenskyy reiterated that Kyiv rules out recognizing Moscow’s control over any part of the Donbas, an economically important region in eastern Ukraine made up of Luhansk and Donetsk. Russia’s army doesn’t fully control either.

“The Americans are trying to find a compromise,” Zelenskyy said, before visiting the Netherlands on Tuesday. “They are proposing a ‘free economic zone’ (in the Donbas). And I want to stress once again: a ‘free economic zone’ does not mean under the control of the Russian Federation.”

The land issue remains one of the most difficult obstacles to a comprehensive agreement.

Putin wants all the areas in four key regions that his forces have seized, as well as the Crimean Peninsula, which Moscow illegally annexed in 2014, to be recognized as Russian territory.

Zelenskyy warned that if Putin rejects diplomatic efforts, Ukraine expects increased Western pressure on Moscow, including tougher sanctions and additional military support for defense. Kyiv would seek enhanced air defense systems and long-range weapons if diplomacy collapses, he said.

Ukraine and the U.S. are preparing up to five documents related to the peace framework, several of them focused on security, Zelenskyy said.

He was upbeat about the progress in the Berlin talks.

“Overall, there was a demonstration of unity,” Zelenskyy said. “It was truly positive in the sense that it reflected the unity of the U.S., Europe, and Ukraine.”

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