Nato leaders have agreed to ramp up defence spending to 5% of their countries' economic output by 2035, following months of pressure from Donald Trump, BBC reported.

The US president described the decision, taken at a summit in The Hague, as a "big win for Europe and... Western civilisation".

In a joint statement, members said they were united against "profound" security challenges, singling out the "long-term threat posed by Russia" and terrorism.

Nato leaders reaffirmed their "ironclad commitment" to the principle that an attack on one Nato member would lead to a response from the full alliance, according to BBC.