Kyiv said it was committed to the search for peace, but that it was waiting for a memorandum from the Russian side setting out their proposals.

With Russia saying its terms for peace must remain secret until the talks begin, Ukraine won’t confirm whether its delegation will even attend.

Ukraine attacked a Russian military object in the far-eastern city of Vladivostok on Friday, marking an escalation between the two countries ahead of an expected second round of talks next week.