We've just heard from Ukrainian President Volodymyr Zelensky, who says Kyiv is ready to meet Russia for ceasefire talks.

Without responding directly to Putin’s invitation for talks in Istanbul, he says: “It is a positive sign that the Russians have finally begun to consider ending the war.”

He adds: “The entire world has been waiting for this for a very long time. And the very first step in truly ending any war is a ceasefire.”

“There is no point in continuing the killing even for a single day. We expect Russia to confirm a ceasefire – full, lasting, and reliable – starting tomorrow, 12 May, and Ukraine is ready to meet.”