Isis declared its ambition to develop weapons of mass destruction in the most recent edition of its propaganda magazine Dabiq, and Indian defence officials have previously warned of the possibility the militants could acquire a nuclear weapon from Pakistan.

According to the Australian foreign minister, Julie Bishop, Nato has expressed deep concerns about the materials seized by Isis from research centres and hospitals that would normally only be available to governments.

Source: Adam Withnall, http://www.independent.co.uk