A Ukraine presidential adviser says Ukraine is ready to resume direct peace talks with Russia in Istanbul on Monday but insists that the Kremlin provide a promised memorandum setting out its position on ending the war.

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

Washington reiterated its willingness to keep Kyiv’s bid to join the North Atlantic Treaty Organization off the table, in line with Moscow’s demands.