Anonymous has published a recording on Friday of a confidential call between FBI agents and London detectives on Youtube, in which the law-enforcement agents discuss action they are taking against hacking. British police said they were investigating reports of the illegally recorded call, and the FBI said a criminal investigation was under way into the incident.

Anonymous also published an email inviting participants to the call, in which an FBI agent wrote that investigations relating to Anonymous, LulzSec, Antisec and associated splinter groups would be discussed on the call.

On the call, one British detective is heard discussing an alleged 15-year-old hacker who they described as "a bit of an idiot" who was doing it for attention. He also tells his U.S. counterpart hosting the call that "we cocked things up in the past" when he is thanked for the help they are providing.

Britons Ryan Cleary and Jake Davis, who have both been charged with hacking-related offences, are discussed on the call.