The three were arrested at their separate home addresses in Hertfordshire and Surrey, Scotland Yard confirmed.
Several searches are being carried out following the arrests, which were made in connection with a number of suspected offences dating between 2004 and 2011, the police added.
The arrests were made by officers from Operation Elveden, the Metropolitan Police investigation into allegations of inappropriate payments to police and public officials.
It was launched in 2011 and arose out of Operation Weeting, an ongoing investigation into phone hacking following revelations that reporters at the now defunct News of the World routinely intercepted voicemails of public figures.
Today