"We're talking about 3,000, 5,000 EU nationals," Rob Wainwright told a parliamentary committee when asked how many foreign fighters had left from Europe.
"We're dealing with a large body of mainly young men who have the potential to come back and have the potential or intent and capability to carry out attacks we have seen in Paris in the last week," he said.
Wainwright also called for greater scrutiny of the use of social media by jihadist groups.
"One of the important evolutions we're seeing right now in the current terrorist threat is the way the Internet is used, clearly much more aggressively, much more imaginatively by the networks," he added.
The European Union's counter-terrorism chief Gilles de Kerchove estimated in September 2014 that around 3,000 European citizens had joined jihadists in Syria and Iraq.
De Kerchove said that around 30 per cent have returned to their EU countries.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
