The FBI has seized a computer server at a New York facility shared by the internet organizations Riseup Networks and May First/People Link. The server was operated by the European Counter Network and ran a program called Mixmaster, which routes emails through anonymous servers in a network. The server also ran a number of mailing lists and websites for political groups. Jamie McClelland of May First said: "The server seizure is not only an attack against us, but an attack against all users of the Internet who depend on anonymous communication." The server was seized as part of an FBI investigation into the bomb threats against the University of Pittsburgh.