's Management Standards Committee, an internal panel set up by the company to probe suspected misconduct.
Evidence in the trial was provided to police by the management standards committee set up by the News of the World's owner, the Met Police said.
Update 1532 BST: News Corporation is trying to reinforce the credibility of how it works with the police and cleans up its UK operations by lifting its management standards committee out of its UK arm, News International.
Scotland Yard said the latest arrest came after information had been provided by News Corporation's management and standards committee.
Scotland Yard said the arrest was the result of information provided to police by News Corporation's Management and Standards Committee.
The Met said the arrest followed the release of information by News Corporation's Management and Standards Committee and relates to the leaking of confidential information.
On Monday, News Corp. announced it had named Lord Grabiner, a commercial lawyer, to head an independent management and standards committee to help investigate the phone-hacking allegations.
In a statement, it said the man, who worked in the Met's Territorial Policing command, was arrested following the release of information by News Corporation's Management and Standards Committee (NCMSC).
The management and standards committee of News Corporation, the parent company of News International, confirmed it had "terminated the contract of a member of staff in relation to his previous work".
News Corporation's Management and Standards Committee was established in the wake of the phone-hacking scandal that resulted in the decision to close of the News of the World in July 2011.
Mr Kavanagh had also told the BBC that there was "unease" at the paper over the fact that News Corporation's Management and Standards Committee had given police information which led to the most recent arrests.
Staff at the Sun are furious - and fearful - at the way the Management and Standards Committee (MSC) of the parent group, News Corp, has given the police apparently incriminating evidence about its own journalists and their alleged sources.
The Met said the arrest was the result of information provided to police by News Corporation's management and standards committee, which was set up in the wake of the phone-hacking scandal that led to the closure of the News of the World newspaper.
Linda Livingstone, dean of Pepperdine University's Graziadio School of Business and Management and a member of the committee that created the new standards, says the most substantive change is the way the organization reframed its rules to encourage "innovation" and "engagement" seen by some as fuzzy terms with few specifics.
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