The prosecutor's statement said the suspects, who were arrested Monday but have not yet been charged, told investigators they planned a late December or early January attack on the Mediterranean military post Fort Bear, where the 23-year-old Djebril A., a former Marine, once worked.
The two others, identified as Ismael K., 17, and Antoine F., 19, said the plan was to decapitate the base chief — a plot that Djebril denied.
The three met online and communicated through an encrypted program.