The attack on the militant group has prompted several investigations into the supply chain behind the devices that detonated this week.

BUDAPEST (Reuters) -She speaks seven languages, has a PhD in particle physics, an apartment in Budapest plastered with her own pastel drawings of nudes, and a career that took her around Africa and Europe doing humanitarian work.

The pager and walkie-talkie attacks were extremely sophisticated in their planning. But the strategic goal isn't clear.