Some European leaders have also pushed back against efforts by Britain, France and Germany - known as the E3 - to take the diplomatic lead for Europe in any dialogue with the Kremlin.

European Council President Antonio Costa has contacted the Kremlin to discuss ending the Ukraine war, signaling a shift in Europe's diplomatic approach.

European Council President António Costa's adviser held two preparatory calls with a Kremlin-linked official to explore Ukraine peace talks. Here's what it