Islamic State claims it could buy its first nuclear weapon from Pakistan within 12 months.
Isis has used its propaganda magazine Dabiq to suggest the group is expanding so rapidly it could buy its first nuclear weapon within a year.
The article, which the group attributes to British hostage John Cantlie, claims Isis has evolved into "the most explosive Islamic movement the modern world has ever seen" in less than 12 months.
Photojournalist Cantlie, who has been held hostage for more than two years, is regularly used in the terrorists' propaganda and has appeared in a number of videos.
The latest article describes militant Islamist groups such as Boko Haram, which recently pledged allegiance to Isis, uniting across the Middle East, Africa and Asia to create one global movement.