The 32-year-old man was arrested in the French town of Vienne on Thursday.
The European Organization for Nuclear Research (Cern), near Geneva, is the organization behind the Large Hadron Collider (LHC) scientific facility, a giant experiment that Cern hopes will help it discover more information than is currently known about the nature of matter.
According to a report by the BBC, the arrested man is believed by French police to have "been in contact over the internet with people linked to al-Qaeda in the Islamic Maghreb, and had been planning attacks in France".
Read more on "Arrested al-Qaeda suspect has Cern links" from ZDNet UK.
