The European Union is ready to "step up" its role in the diplomatic process to end Russia's full-scale invasion of Ukraine, but only when Moscow demonstrates a serious commitment to negotiations and establishes an "unconditional ceasefire", according to draft conclusions prepared ahead of a key leaders' summit on 18-19 June.

It marks the first time the conclusions speak of the bloc taking a hands-on approach to the peace process, which the United States has so far led and is currently stalled.

The provisional wording, subject to changes, falls short of endorsing the appointment of a special envoy, as some member states have demanded. The references could still change further before the summit takes place.

"The European Council supports diplomatic efforts to bring the war to an end and underlines the European Union's readiness to step up its engagement in peace negotiations," the draft, seen by Euronews and dated 1 June, says.

"However, Russia has not shown any genuine willingness regarding a fair and sustainable peace," the paragraph continues.