Russian and Ukrainian delegates met in Istanbul on Monday for their second set of direct peace talks, a day after Kyiv launched a shock drone attack on Russia’s nuclear-capable bombers, in an operation that President Volodymyr Zelensky said was a year and a half in the making.

Russian and Ukrainian officials are due to hold peace talks in Istanbul with no sign they are any closer to an agreement.

Russia took weeks to present to Ukraine with a “memorandum” setting out its conditions for a ceasefire, as well as key guidelines for a comprehensive treaty to end the 3-year-old war.