An ex-healthcare worker has been arrested over allegations he leaked stories about Ian Brady, according to Sky sources.
The 59-year-old man was held at around 6.30am at his home in the Knowlsey area on suspicion of misconduct in a public office, corruption and conspiracy to commit both those offences.
He is being questioned at a police station in Merseyside and his home is being searched.
The alleged offences took place while Moors killer Brady was a patient at Ashworth Hospital, a high security psychiatric hospital in Maghull, Merseyside.
The arrest, under the Metropolitan Police's Operation Elveden, is as a result of information given to police by News Corporation's Management and Standards Committee.
It brings the number of people detained under the operation into alleged corrupt payments to public officials to 57.