U.S. authorities say the leak of a conference call between the FBI and Scotland Yard came about due to an Irish police officer's blunder.
A U.S. indictment says a teenage hacker was able to eavesdrop on the sensitive call after the unnamed Irish officer forwarded a work message to an insecure personal email account.
The FBI says 19-year-old Donncha O'Cearrbhail intercepted the email and used the information in it to access and secretly record the Jan. 17 call.
In the call, FBI and Scotland Yard investigators discussed ways to bring down the hacking collective known as Anonymous
Anonymous later published a roughly 15-minute-long recording of the call to the Internet.
A spokesman for Ireland's national police force declined to comment Tuesday.