AMSTERDAM - French, Germans and Britons make up the highest number of foreign fighters in the Syrian rebel ranks from European countries, but Belgium is the largest contributor in proportion to its population, a Dutch study shows.
Europeans fighting alongside Islamist groups in Syria and Iraq have been high on the agenda of European security concerns for several
years. Returned volunteers have been involved in attacks in Paris and Brussels over the past 18 months, including last month's bomb blasts in the Belgian capital.
The study, prepared by the Hague-based International Centre for Counter-Terrorism, said European Union countries should not be complacent about their citizens leaving to fight in the Middle East, even those that have seen little such movement.