Internet "pirates" Anonymous are said to have been responsible.
The call held sensitive information which would have been especially useful to Anonymous. The BBC has reported that the call covered "the tracking of Anonymous and similar groups, dates of planned arrests and details of evidence held". Yes very useful indeed.
Rubbing salt into the wound Anonymous released a recording of the call and an e.mail which held all the call participants e.maul addresses. A twitter account, AnonymousIRC, said: "The FBI might be curious how we're able to continuously read their internal comms for some time now."
The FBI is now searching for those responsible and issued a statement saying, "The information was intended for law enforcement officers only and was illegally obtained. A criminal investigation is under way to identify and hold accountable those responsible."
No matter what your stance on Anonymous is, this is bad news for those of us who love the relative freedom of the Internet. Slowly but surely the World Wide Web will disintegrate. It will face regulation and controls that will damage its fabric. That would be a shame. It has been one of the most fascinating and useful tools available for a myriad of uses and a truly multicultural community,