Agents of the Federal Bureau of Investigations seized a server belonging to an Italian Internet service provider on Thursday as part of an investigation into a series of anonymous bomb threats sent to the University of Pittsburgh. But the groups associated with the operation of the server are calling the seizure an attack on Internet anonymity. The server that was seized belongs to the Italian political activist Internet service European Counter Network, and hosted a node of the Mixmaster anonymous remailer service. It was seized under a search warrant served on a co-location facility in New York shared by Riseup networks (a “technology collective” that provides secure communciations for activists) and May First/People Link (an Internet co-op). The server also provided e-mail and other services to ECN’s users.

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FBI seizes activists’ anonymous remailer server in bomb threat investigation