Recent IS battlefield reversals trigger terror attacks in Europe

Experts say extremists infiltrate with recent influx of migrants from Middle East

Recent battlefield reversals for the self-proclaimed Islamic State in Syria and Iraq mean the focus has shifted to individual terror attacks in Europe and elsewhere in the Middle East, security analysts said.

But the terror attacks in France, Belgium and Germany fall into three distinct categories, which are making it increasingly difficult for intelligence services to foil attempts. Terror attacks in the Middle East tend to be car and trucks bombs, whereas those in Europe are perpetrated by single assailants or small groups.