Russia and Ukraine are expected to hold another round of negotiations on Wednesday in Istanbul, but the two warring countries have flatly rejected each other’s demands.

Ukraine said it would send a high-level negotiating team to Turkey peace talks with Russia, even as Moscow wrote off the talks before they had started.

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.