A former prison officer has been arrested by detectives investigating alleged corrupt payments to public officials, police said.
The 39-year-old man was arrested at his home in Waltham Forest, north-east London, at about 6am on Thursday on suspicion of misconduct in a public office and corruption, Scotland Yard said.
He is the 66th person arrested under Operation Elveden, Scotland Yard's investigation into alleged inappropriate payments by journalists to public officials.
A Scotland Yard spokesman said: "Officers from Operation Elveden arrested a man at his home in the London borough of Waltham Forest this morning, June 6. The 39-year-old man (Elveden arrest 66) is a former prison officer.
"He was arrested for suspected misconduct in a public office and suspected corruption, and is being interviewed at an east London police station."