The hackers group Anonymous,  scored a major victory on the F.B.I last month when they listed to a call between the law enforcers and their British counterparts, Scotland Yard. The group then posted the16-minute recording of the call on the Web on Friday .

NYT is quoting an F.B.I Source indicating that the group did not hack any of the agency’s systems but gained access to an email which was sent to more than 36 US, UK, France, Germany, Ireland, Netherlands and Swedish security agents indicating when the conference call would be made. The email was sent on Jan. 13 and one of the foreign police official is suspected to have forwarded the notification to a private account. The forward to private account was then intercepted by Anonymous.

Anonymous later took responsibility for hacking the web site of a law firm that had represented a US Marines soldier, Staff Sgt. Frank Wuterich, who was accused of leading a group of Marines responsible for Haditha killings in 2005. The group promised to make public what was in the mails and faxes obtained during the hack.