During the course of the investigation, voluminous documents relating SAVAMA to the Kurdish Hezbollah were found. In addition, the Ankara police detained three suspects who were found to have stayed at a hotel in Ankara before the attack: Yusuf Karakuş, Abdülhamit Çelik, and Mehmet Şahin. Karakuş said that two Iranian spies were involved in the bombing: Muhammed Reza and Muhsin Karger Azad. Çelik, a.k.a. "Abdullah Gürgen", said he reported to Muhsin Karger Azad. Azad was ostensibly a consulate employee, but secretly an alleged Gladio member.