Detectives investigating phone hacking by the News of the World have arrested a man at his home.
The 35-year-old was arrested at 5.55am on Wednesday on suspicion of conspiring to intercept communications.
Unlike many of those arrested by the 50-strong team of detectives from Operation Weeting the man was not arrested by prior appointment.
Following the arrest he was taken to a north London police station. He will be questioned on suspicion of conspiracy to intercept voicemail messages, contrary to Section 1 (1) Criminal Law Act 1977.
Scotland Yard refused to make any further comment.
Fifteen people have previously been arrested as part of the police's Operation Weeting inquiry. Most of them have worked for or been linked to the News of the World. Nobody has been charged, and one of those arrested, Laura Elston, from the Press Association, has been told that she has been dropped from the inquiry and will face no further action.
Those arrested include former News of the World editors Rebekah Brooks and Andy Coulson, and senior journalists who had worked at the now closed Sunday title, including Neville Thurlbeck, who was chief reporter, Ian Edmondson, who was news editor, and James Weatherup, assistant news editor.
Run by Sue Akers, a deputy assistant commissioner with the Metropolitan police, Weeting has been up and running since January. About 60 officers have been combing through 11,000 pages of evidence seized from the notebooks of Glenn Mulcaire, the £100,000-a-year private investigator who conducted hacking for the News of the World.