Russia proposed new Ukraine talks in İstanbul next Monday to present its peace plan.
Kyiv insists on seeing the plan beforehand for the meeting to be productive.
Previous direct talks in İstanbul on May 16 yielded no breakthrough.
US President Trump is increasingly frustrated with Russia’s stalling, setting a two-week timeframe to assess Putin’s seriousness.
Ukraine stated it already submitted its terms and awaits Russia’s memorandum.
Ukrainian defense minister Umerov stressed the need for substantive diplomacy and results.
Russia said it would present its “memorandum” in İstanbul, with Lavrov briefing US counterpart Rubio.
Lavrov confirmed Russia’s delegation is ready for the second round of talks on June 2.
Recent weeks saw increased aerial attacks from both sides.
Trump expressed disappointment at Russia’s bombardments during negotiations but didn’t impose new sanctions.
The Kremlin rejected a three-way summit with Zelensky and Trump, wanting “concrete agreements” first.
Russia demands Ukraine abandon NATO ambitions and cede territory, which Kyiv rejects.
