The announcement appears to preclude any kind of top-level meeting or breakthrough ahead of the 50-day deadline for an agreement given by President Donald Trump.

Negotiators from Moscow and Kyiv discussed the possibility of a meeting between Ukrainian President Volodymyr Zelensky and Russian counterpart Vladimir Putin during their talks in Istanbul this week,

Ukrainian and Russian officials ended their third round of peace negotiations in under an hour Wednesday — falling short of establishing a cease-fire but agreeing to a prison swap. The talks took place in Istanbul just over a week after President Trump threatened Russian President Vladimir Putin with “very severe tariffs” if he doesn’t commit to a cease-fire in Ukraine within 50 days.