German federal prosecutors said on Thursday they had cleared the sole suspect in custody for a bomb attack against the Borussia Dortmund football team bus of involvement.
The announcement marked a setback for investigators, who described the three blasts late Tuesday as a “terrorist” act and said they are focusing on suspects in the “Islamist spectrum”.
“The investigation has not found evidence that the suspect took part,” the prosecutors office said in a brief statement.
It said it was nevertheless seeking an arrest warrant for a 26-year-old Iraqi national, identified only as Abdul Beset A., for alleged ties to the ISIS group. Investigators had zeroed in on two suspects believed to belong to a large jehadis scene in the Ruhr region, after three identical letters were found at the scene. Only Abdul Beset A. Was detained.