The FBI announced on Wednesday that an ongoing cybercrime initiative, dubbed Operation Bot Roast, has identified more than a million PCs compromised with bot software and resulted in charges against three people for violations of the Computer Fraud and Abuse Act.

The U.S. Department of Justice, along with its partners at the Computer Emergency Response Team (CERT) Coordination Center at Carnegie Mellon University and the Botnet Task Force, aim to disrupt the operations of bot masters, or bot herders, that compromise their victims machines to use for sending spam or attacking other computers.