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.

Polish police found metal and plastic fragments from an unidentified object in a field after they were dispatched to reports of an explosion.

Ukraine's European allies have prioritized securing security guarantees for Kyiv as a core precondition for any deal to end the Ukraine war.

NATO Secretary General Mark Rutte said on Monday NATO membership for Ukraine was not under discussion but that there was a discussion on "Article 5" type security guarantees for the country that Russia invaded in February 2022.

Trump said after his meeting in Alaska last week with Russian President Vladimir Putin that Putin was open to the idea of security guarantees for Ukraine. View on euronews

Nato secretary general Mark Rutte pronounced himself “excited” over Trump’s public commitment, on Monday at a summit at the White House, to some sort of security guarantee, a pledge the Europeans have been eagerly seeking. He called it “a breakthrough”.

Mark Rutte, the NATO secretary general, pronounced himself “excited” over Mr. Trump’s public commitment on Monday at a summit at the White House to some sort of security guarantee, a pledge that the Europeans have been eagerly seeking. He called it “a breakthrough.”

NATO military leaders are expected to meet on Wednesday to discuss Ukraine and the way forward, a U.S. official and NATO official told Reuters on Tuesday.