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

Russia says it will send a delegation to Istanbul on Monday for a second round of peace talks with Ukraine. Kremlin spokesman Dmitry Peskov said Moscow's conditions for a temporary truce were being developed and would be discussed in Turkey.

Ukraine’s foreign minister on Friday accused Russia of stalling peace negotiations, saying that Moscow had yet to share a promised memorandum outlining its peace terms. He said Kyiv wanted to see that document before sending a delegation to a new round of talks Moscow has proposed for Monday in Istanbul.