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.

Russian and Ukrainian negotiators will meet in Istanbul on Wednesday evening for their first peace talks in more than seven weeks, with Moscow under pressure from U.S. President Donald Trump to strike a deal or face tough new sanctions.

A third round of peace talks between Ukrainian and Russian officials is planned to take place later this week in Turkey, according to Ukraine’s President Volodymyr Zelensky. “Today, I discussed with Rustem Umerov the preparations for the exchange and another meeting in Turkey with the Russian side.