In a brief joint statement, police and PET said a series of raids were also carried out in greater Copenhagen. The suspects will face a judge Thursday, and prosecutors are expected to demand they be held in pre-trial detention. Prosecutors say the hearing should be held behind closed doors because of the ongoing investigation.
No other details were available. It was unclear whether the case was linked to the arrests in Denmark a year ago of a 28-year-old man for allegedly shipping drones, drone components and infrared cameras for the Islamic State group via Turkey.