Two police officers and a journalist have been arrested by detectives investigating alleged corrupt payments to public officials.
The three were all held at their homes at 6am on suspicion of offences between 2004 and 2011, Scotland Yard said.
The arrests are as a result of information provided to police by News Corporation's Management and Standards Committee.
The 39-year-old journalist was held at his home in Hertfordshire on suspicion of conspiracy to corrupt and conspiracy to cause misconduct in a public office, and is being interviewed at a police station in north London.
One of the police officers, a 47-year-old man, is from the Metropolitan Police Specialist Operations command and was arrested in Surrey on suspicion of misconduct in public office and corruption.
The other, a 30-year-old man, is from the Met's Specialist Crime and Operations command and was held in Surrey on suspicion of the same offences.
Today's arrests bring the number of people detained as part of Operation Elveden, the investigation into alleged corrupt payments by journalists, to 56.
Specialist Crime and Operations deals with a range of serious offences across the capital, including murder, rape and organised gangs.
It also provides armed officers and dog handlers and deals with public order issues.
Specialist Operations deals with protection of public figures including the Royal Family and Government ministers, counter-terrorism and security at the Houses of Parliament and City and Heathrow Airports.