NATO considers "more aggressive" stance against Russia's hybrid warfare, including pre-emptive cyber operations, as tensions escalate over sabotage.

After being blindsided by President Donald Trump’s 28-point plan last month, some Europeans have expressed extreme disquiet at being apparently sidelined in talks.

Russian President Vladimir Putin said that his country is prepared to fight against European nations, many of which are part of the North Atlantic Treaty Organization (NATO), in a comments to reporters on Tuesday.

German Foreign Minister Johann Wadephul warns that intelligence shows Russia may attack NATO by 2029, citing Moscow's military buildup and economic shift toward war.

The European Union has unveiled a plan to use frozen Russian assets to support Ukraine over the next two years.