A serving police officer and three men have been arrested over payments to police officers in the phone hacking inquiry.
The 29-year-old male officer was arrested at a police station in central London where he works and three men, aged between 48 and 56, were detained after police swooped on their homes, Scotland Yard confirmed.
The suspects were arrested under Operation Elveden – which runs alongside the Operation Weeting hacking inquiry.
Officers are searching the offices of News International in Wapping, east London, and the home addresses of the suspects, a spokesman said.
The officer, who serves with the MPS Territorial Policing command, is being questioned at a south London police station.
He was arrested on suspicion of corruption, misconduct in a public office and conspiracy in relation to the offences.
Policeman arrested in hacking probe