Prosecutors are to announce on Tuesday whether they will bring charges in relation to the investigation into alleged phone hacking by journalists.
Sue Akers, the Met Police deputy assistant commissioner, said at Leveson on Monday that 12 journalists detained as part of the investigation are all due to answer police bail on Tuesday. A 13th journalist has been bailed until August.
Although not named by the CPS, those arrested include former News of the World Editors Rebekah Brooks and Andy Coulson, and former chief reporter Neville Thurlbeck.
So far, 24 in total people have been arrested under Operation Weeting.
Crown Prosecution Service (CPS) legal adviser Alison Levitt QC is expected to reveal at around 11am whether anyone arrested so far under the Operation will face prosecution.
Levitt is Principal Legal Adviser to the Director of Public Prosecutions Keir Starmer and is overseeing decisions over potential prosecutions linked to phone hacking.
Police have also detained 41 people under Operation Elveden, a probe into alleged corrupt payments to public officials, and seven under Operation Tuleta, which is looking at accusations of computer hacking and privacy infringement.
So far, six people including former Sun editor Rebekah Brooks and her husband Charlie, have been charged.
Mrs Brooks faces three charges of conspiring to pervert the course of justice, while her husband is charged with one count of the same offence.
The couple are due to enter pleas when they appear at Southwark Crown Court in London on 26 September.
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