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.

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.

President Trump hosts a group of European leaders at the White House immediately after a meeting with Ukrainian President Zelenskyy.

President Donald Trump meets with Zelenskyy and European leaders to discuss Ukraine security guarantees and potential peace agreement.

General Christopher Donahue, commander of U.S. Army Europe and Africa, said allies could seize Kaliningrad "in a timeframe that is unheard of."

Russian leader Vladimir Putin agreed at his summit with President Donald Trump that the United States and its European allies could offer Ukraine a security guarantee resembling NATO’s collective defense mandate as part of an eventual deal to end the war,

European shares opened higher and oil prices slid on Tuesday before a key meeting of central bankers and as traders evaluated promising diplomatic signals toward ending hostilities between Russia and Ukraine.

Donald Trump said the US would help arrange European security guarantees for Ukraine if peace could be agreed with Russia, as he pledged to set up a meeting between Volodymyr Zelenskyy and Vladimir Putin.