Russia has yet again ignored Donald Trump’s bid to hold a summit between Vladimir Putin and Volodymyr Zelensky and said attempts to resolve security issues for Kyiv without Moscow’s participation was a “road to nowhere”.

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.

The Kremlin’s goal is to destabilize Europe, and attacks on infrastructure are a preferred weapon, a new report said.

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

The push for a bilateral meeting comes after the US president met Putin in Alaska last week, and welcomed seven European leaders and Zelensky to the White House on Monday. Trump admitted the conflict was "a tough one" to solve and conceded it was possible the Russian president was not interested in ending hostilities.