KYIV, Ukraine — Ukrainian President Volodymyr Zelenskyy said Thursday that negotiators are wrestling with the question of territorial possession in U.S.-led peace talks on ending the war with Russia, including the future of Ukraine’s eastern Donetsk region and the Russian-occupied Zaporizhzhia nuclear power plant, one of the world’s 10 biggest atomic plants.

Zelenskyy revealed details of the ongoing discussions before he headed into urgent talks with leaders and officials from about 30 countries that support Kyiv’s efforts to obtain fair terms in any settlement to halt nearly four years of fighting.

In Washington, White House press secretary Karoline Leavitt said President Donald Trump’s special envoy, Steve Witkoff, continued to be in discussions with both sides. She said that “if there is a real chance of signing a peace agreement,” then the U.S. could send a representative to the talks as soon as this weekend.

But Leavitt added that it’s “still up in the air whether we believe real peace can be achieved.”

Trump long boasted about being able to solve Russia’s war in Ukraine in a day, but in recent months has complained bitterly about a lack of progress. Leavitt echoed that during her briefing with reporters on Thursday, saying the president is “extremely frustrated with both sides of this war.”

She said the administration had spent 30-plus hours in recent weeks meeting with officials from Russia, Ukraine and Europe, and that Trump is “sick of meetings just for the sake of meeting.”

“He doesn’t want any more talk,” Leavitt said. “He wants action.”