King Abdullah of Saudi Arabia has repeatedly urged the United States to attack Iran to destroy its nuclear programme, according to leaked US diplomatic cables that describe how other Arab allies have secretly agitated for military action against Tehran.

The revelations, in secret memos from US embassies across the Middle East, expose behind-the-scenes pressures in the scramble to contain the Islamic Republic, which the US, Arab states and Israel suspect is close to acquiring nuclear weapons. Bombing Iranian nuclear facilities has hitherto been viewed as a desperate last resort that could ignite a far wider war.