The Presse Portal news outlet specified that the central role in the attack was planned for Oguz G. and Marcia M., a German couple who lived in Syria and recruited German women to join the organization and marry Daesh* members so that they could legally come to Europe. One of such women was reportedly an undercover agent, who helped gain information on the preparation of the attacks.
The mastermind of the attacks was a senior Daesh member, identified as Thomas C., a Swiss national killed earlier in Syria, the daily added.
In September, the German Prosecutor General's Office informed about the arrest of Sarah O., 20, who has German and Algerian citizenship, in Duesseldorf, and was suspected of being a member of the Daesh terror group.
*Daesh (also known as ISIS/ISIL/IS) is a terrorist group banned in Russia