Russia's Vladimir Putin said he agrees in principle with a U.S. proposal for a 30-day ceasefire in Ukraine, but that the terms need to be worked out.

But Ukrainian President Volodymyr Zelensky accuses Russia of dragging out ceasefire talks so it can continue the war.

Despite flirting with Trump there is little evidence Putin has shifted from his core war goals: cementing his landgrabs in Ukraine and stopping it joining NATO.