Rebekah Brooks was questioned by Scotland Yard detectives yesterday about alleged corrupt payments to Ministry of Defence officials.
A spokesman for the former chief executive of News International refused to discuss details but a source said: "She was returning to answer bail in Milton Keynes this morning and was asked details about confidential sources for the Ministry of Defence. She was not asked about any other matters."
Brooks was first arrested in July last year on suspicion of phone hacking and corruption. Two days after she stepped down from running Rupert Murdoch's British newspaper group. She was re-arrested last week at her home in Oxfordshire, with her husband Charlie.
The couple, and four others including News' head of security, Mark Hanna, were held on suspicion of perverting the course of justice. Those arrests suggested Scotland Yard was moving its focus from voicemail interception to a possible cover-up at News International headquarters in Wapping, east London.
As Scotland Yard has stepped up its investigation News Corporation has distanced itself from previous wrongdoing by passing information to the Met's anti-bribery inquiry, Operation Elveden. A third Scotland Yard inquiry, Operation Tuleta, is investigating allegations of computer hacking involving newspapers dating back more than 20 years.
