A US military official has said that at least 50 foreign ISIS fighters have been captured in Syria and Iraq since the beginning of November. The ISIS operatives came from several countries in the Middle East, Europe, Africa and Southeast Asia.
The military official echoed that some were captured as they attempted to flee or gain access to the ISIS-controlled areas by hiding in civilian vehicles but were discovered by the US-backed Syrian Democratic Forces or Iraqi Security Forces.
Moreover, according to intelligence sources, at least 40,000 foreign fighters from over 120 countries have travelled to Syria and Iraq to join ISIS and the stringent security and immigration rules set up in the past year is preventing them from traveling back to their home countries to conduct attacks.
The US-led coalition estimates that fewer than 3,000 ISIS fighters remain in Syria and Iraq, largely confined to more remote areas after having been driven out of major urban areas.