sentences:  Both Saudi Arabia and Pakistan have denied the existence of any such agreement.Western intelligence sources have told "The Guardian" that the Saudi monarchy has paid for up to 60% of the Pakistan's atomic bomb projects and in return has the option to buy five to six nuclear warheads off the shelf.In November 2013, a variety of sources told BBC Newsnight that Saudi Arabia had invested in Pakistani nuclear weapons projects and believes it could obtain nuclear bombs at will.