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.

U.S. President Donald Trump and Russian President Vladimir Putin agreed to meet Friday in Alaska in hopes for a cease-fire involving Ukraine and end to the war.

The vice president said the White House was trying to determine “when these three leaders could sit down and discuss an end to this conflict.”