The Greek authorities believe the seven are members of the Conspiracy of the Cells of Fire, which belong to the galaxy of the Informal Anarchist Federation. The Ccf/Fai claimed the campaign of parcel bombs in Greece. Parcel bombs were sent to some European leaders, including Sarkozy, Merkel and Berlusconi at the end of 2010.
The Bologna investigation, carried out by the Digos and coordinated by public prosecutor Enrico Cieri, relied a lot on the results of the Greek investigation, which led to the imprisonment of the seven. Some assessments were carried out by rogatory, while others were made directly in Athens by the Bologna investigators, who brought the results of their examination on the parcel bomb found on the plane to their Greek colleagues.
The seven Greek anarchists are accused of having fabricated and sent the parcel bomb addressed to Berlusconi. The parcel was loaded on a plane of the Tnt flying from Athens to Liege. The alarm was raised because of the name of the Italian prime minister as addressee. The plane, which was flying over Italy, was made to land in Bologna at 10pm.
The explosive device was placed inside a law text written in Greek, which had been cut so that some gunpowder and a primer could be put inside it. The activation system was made by an electric circuit, a halogen lamp fed by eight batteries of 1.5 volt, a peg working as fire switch and gunpowder with explosive material.