Vladimir Putin is demanding that Ukraine give up all of the eastern Donbas region, renounce ambitions to join NATO, remain neutral and keep Western troops out of the country, three sources familiar with top-level Kremlin thinking said.

The Russian president met U.S. President Donald Trump in Alaska on Friday for the first Russia-U.S. summit in more than four years and spent almost all of their three-hour closed meeting discussing what a compromise on Ukraine might look like, according to the sources who requested anonymity to discuss sensitive matters.

Speaking afterward beside Trump, Putin said the meeting would hopefully open up the road to peace in Ukraine — but neither leader gave specifics about what they discussed.