NATO says Russia's ‘aggressive actions’ a threat to allies' security

• They also invited the secretary-general of NATO to start a reflection process on the future of the alliance.
• The 29 leaders reaffirned the "enduring Transatlantic bond" between Europe and North America.

In a statement released after a brief summit outside London, the 29 leaders reaffirned the "enduring Transatlantic bond" between Europe and North America, and the mutual defence agreement between them in which an attack against one is regarded as an attack against all.

They also invited the secretary-general of NATO to start a reflection process on the future of the alliance.