Analysis of a windfall of data from inside "Islamic State" (ISIS) shows fighters of more than 70 nationalities joined the ruthless terrorist group, researchers said after examining thousands of records, AFP reports.
The treasure trove came from an ISIS defector who handed over some 11,000 personnel files to US television network NBC, although more than half were found to be duplicates.
NBC then passed 4,600 of the documents to the Combating Terrorism Center (CTC), which is based at West Point but independent from the US military academy.