A diplomatic scramble unfolded Saturday after President Donald Trump announced he would meet his Russian counterpart, Vladimir Putin, next week in Alaska, as European leaders rushed to understand the terms of the meeting and ensure Ukraine was not being left out of discussions about its future.

Trump’s announcement came as a surprise to Ukrainian President Volodymyr Zelensky, who responded in a video posted Saturday morning with an emphatic refusal to cede any Ukrainian territory to Russia.

President Donald Trump is open to holding a trilateral summit in Alaska with Russian President Vladimir Putin and Ukrainian President Volodymyr Zelenskiy, a White House official said on Saturday.