Scotland Yard officers arrested a 45-year-old woman this morning over alleged breaches of privacy.
The unnamed suspect is being quizzed by Operation Tuleta officers at a South London cop shop while her home is searched.
She was cuffed on suspicion of conspiring to commit offences under Sections 1 and 3 of the Computer Misuse Act 1990, and Sections 1 and 2 Regulation of Investigatory Powers Act 2000, police said.
Officers added: "This arrest is not directly linked to any news organisation nor the activities of journalists."
Op Tuleta is a probe into alleged computer hacking and is related to the Met's voicemail interception investigation (Op Weeting) and claims of bribes to police and officials (Op Elveden). ®