Rabei Osman Sayed Ahmed and Yahia Ragheh, his 22-year-old disciple, will be tried in Milan in January.
The indictment calls Ahmed an "organizer of the terrorist group responsible for the Madrid attacks," a "recruiter of numerous people ready to commit suicide attacks," and a "coordinator of terrorist cells" abroad.
The police report charges that he used cassette tapes, cellphones, CDs, and computers as recruitment tools, highlighting how the Internet potentially can transform any living room into a radical madrasa.
Substantial information about Ahmed surfaced through wiretaps of telephone conversations. In one conversation, Ahmed appeared to be recruiting people to carry out suicide attacks in Iraq and preparing a second attack, perhaps in Europe.