The GBA’s statement noted investigators have so far produced 'no evidence' of the suspect’s direct involvement in the attack but they strongly suspected that Abdul Beset A. joined IS in late 2014 in Iraq.
In March 2015, he was said to have traveled to Turkey and then arrived in Germany at the beginning of 2016, the GBA said. The suspect maintained contact with IS even from inside Germany, it added.
According to the statement, the investigation also revealed that the suspect led a unit of 10 militants whose task was 'to prepare and execute abductions, extortions and killings.'
The German Prosecutor's office classified the incident as a terrorist attack.