Ukrainian President Volodymyr Zelenskyy said he wants a “strong reaction” from the U.S. government if Russian President Vladimir Putin does not sit down with him for a bilateral meeting.

This comes as U.S. President Donald Trump is seeking to broker a peace agreement between the two countries that have been at war since Moscow’s February 2022 invasion of Ukraine, although Trump has conceded that Putin may not be prepared to make a deal.

Zelenskyy has said he has already agreed to a proposed meeting with Putin.

Trump separately met with Zelenskyy and Putin. (Win McNamee/Getty Images)

Zelenskyy said it was unclear what concessions about territory Russia was willing to make to end the conflict. Trump has previously said Kyiv and Moscow would both need to cede territory.

“To discuss what Ukraine is willing to do, let’s first hear what Russia is willing to do,” Zelenskyy said. “We do not know that.”

Reuters contributed to this report.