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.

Tony Radakin, Chief of the UK Defence Staff, will tell his American counterparts that the UK is ready to send troops to defend Ukraine's airspace and waters, but not to the line of contact with Russia.

President Donald Trump has spent the past several days on a diplomatic sprint, setting the groundwork for a potential trilateral meeting with Russian leader Vladimir Putin and Ukrainian President Volodymyr Zelenskyy to discuss pathways to end the yearslong war.

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

Russian state media footage shows the M113 armored personnel carrier driving into combat in the Zaporizhzhia region.

President Trump met with Ukrainian President Volodymyr Zelensky and European leaders in the quest for a path to end the war with Russia.

U.S. President Donald Trump told President Volodymyr Zelenskiy on Monday that the United States would help guarantee Ukraine's security in any deal to end Russia's war there, though the extent of any assistance was not immediately clear.