News International's former legal adviser Tom Crone was arrested today by police investigating alleged phone hacking.
Mr Crone was held at his home in south-west London on suspicion of conspiring to intercept communications and is being questioned at a south London police station.
He is the 25th person to be arrested under Operation Weeting, the Metropolitan Police's investigation into allegations of media malpractice.
The investigation is being run alongside two separate probes.
Operation Elveden is looking at alleged corrupt payments to public officials while Operation Tuleta concerns accusations of computer hacking and other privacy breaches, including the alleged hacking of stolen mobile phones.
So far 43 people have been arrested under Elveden and 11 under Tuleta.
Former News International chief executive Rebekah Brooks is due to appear at Westminster Magistrates' Court on Monday over charges linked to Operation Weeting.