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.

Presidents Donald Trump and Vladimir Putin will hold a high-stakes meeting about the Ukraine war on Friday in Alaska, which the United States bought from Russia more than 150 years ago.They fled just weeks after Putin ordered an unpopular mobilization of citizens to boost his invasion of Ukraine.

Trump said the two leaders will meet next Friday. It remains unclear whether Ukrainian President Volodymyr Zelenskyy will be involved with the high-stakes summit.