The statement backed defence links between the allies following Saudi Arabia’s decision to blockade Yemen’s ports to stop weapons coming in from Iran.
A coalition led by Saudi Arabia have closed all ground, air and sea access to Yemen following a rocket attack on Riyadh, claim reports.
The missile attack, thought to have been launched by Shiite Houthi fighters, was manufactured by Iran, Saudi Arabia claimed.
They said the attack was a “clear act of aggression” by Iran and “could rise to be considered an act of war”.
The Pentagon backed the claims revealing Iran’s “malign role in Yemen and its provisions of dangerous missile systems to Houthi militants”.
Donald Trump has backed the Saudi monarch King Salman on Twitter following his purge of the country’s elite following claims of corruption.
The President tweeted: “I have great confidence in King Salman and the Crown Prince of Saudi Arabia, they know exactly what they are doing some of those they are harshly treating have been ‘milking’ their country for years.”
Prince Alwaleed bin Talal, who owns investment firm Kingdom Holding, was among 11 princes, four ministers and tens of former ministers detained in a purge designed to consolidate Crown Prince Mohammed bin Salman’s hold on power.
Prince Alwaleed is one of Saudi Arabia’s best-known international businessmen as an investor in firms such as Citigroup and Twitter.