European leaders are set to meet to coordinate the next steps on security guarantees for Ukraine after high-level talks in Washington, as diplomatic efforts intensify ahead of a possible trilateral summit involving Kyiv and Moscow.

Special U.S. envoy Steve Witkoff says Russian leader Vladimir Putin agreed to allow the U.S. and Europe to offer Ukraine a security guarantee resembling NATO's collective defense mandate.

European and NATO leaders are joining Ukrainian President Volodymyr Zelensky in Washington on Monday to present a united front in talks with President Donald Trump. US special envoy Steve Witkoff on Sunday said Russia is open to the idea of the US and its European allies offering Ukraine a security guarantee resembling NATO’s collective defence mandate.