Six people including former News International CEO Rebekah Brooks and her husband Charlie have been bailed after being arrested on suspicion of conspiracy to pervert the course of justice.
Three of the six were named as Rebekah Brooks, Charlie Brooks and News International head of security Mark Hanna.
All were arrested in coordinated dawn raids by Operation Weeting officers.
Operation Weeting is the investigation into phone hacking at News International's News of the World.
It was set up in 2011 alongside Operation Elveden, an investigation into public sector bribery by those involved in phone hacking, and Operation Tuleta, an investigation into computer hacking.