BREMEN, Germany — Believing he was answering a holy call, Harry Sarfo left his home in the working-class city of Bremen last year and drove for four straight days to reach the territory controlled by the Islamic State in Syria.
He barely had time to settle in before members of the Islamic State’s secret service, wearing masks over their faces, came to inform him and his German friend that they no longer wanted Europeans to come to Syria. Where they were really needed was back home, to help carry out the group’s plan of waging terrorism across the globe.
“He was speaking openly about the situation, saying that they have loads of people living in European countries and waiting for commands to attack the European people,” Mr. Sarfo recounted on Monday, in an interview with The New York Times conducted in English inside the maximum-security prison near Bremen. “And that was before the Brussels attacks, before the Paris attacks.”
The masked man explained that, although the group was well set up in some European countries, it needed more attackers in Germany and Britain, in particular. “They said, ‘Would you mind to go back to Germany, because that’s what we need at the moment,’” Mr. Sarfo recalled. “And they always said they wanted to have something that is occurring in the same time: They want to have loads of attacks at the same time in England and Germany and France.”
The operatives belonged to an intelligence unit of the Islamic State known in Arabic as the Emni, which has become a combination of an internal police force and an external operations branch, dedicated to exporting terror abroad, according to thousands of pages of French, Belgian, German and Austrian intelligence and interrogation documents obtained by The Times.
The Islamic State’s attacks in Paris on Nov. 13 brought global attention to the group’s external terrorism network, which began sending fighters abroad two years ago. Now, Mr. Sarfo’s account, along with those of other captured recruits, has further pulled back the curtain on the group’s machinery for projecting violence beyond its borders.
What they describe is a multilevel secret service under the overall command of the Islamic State’s most senior Syrian operative, spokesman and propaganda chief, Abu Muhammad al-Adnani. Below him is a tier of lieutenants empowered to plan attacks in different regions of the world, including a “secret service for European affairs,” a “secret service for Asian affairs” and a “secret service for Arab affairs,” according to Mr. Sarfo.