SAUDI ARABIA has taken the “strategic decision” to acquire “off-the-shelf” atomic weapons from Pakistan, risking a new arms race in the Middle East, according to senior American officials.

The move by the Gulf kingdom, which has financed much of Islamabad’s nuclear programme over the past three decades, comes amid growing anger among Sunni Arab states over a deal backed by President Barack Obama, which they fear could allow their arch foe, Shi’ite Iran, to develop a nuclear bomb.

The agreement, which is due to be finalised by the end of next month and involves the permanent members of the UN security council and Germany, is designed to roll back part of Tehran’s nuclear programme in return for an easing of UN sanctions....