Two journalists and a policeman were arrested by British police on Wednesday over alleged corrupt payments, Scotland Yard said.
In dawn raids, officers detained a 51-year-old journalist at his home in Bristol, southwest England, and a 32-year-old journalist at his house in London, it said in a statement.
News International, the British newspaper wing of Murdoch's US-based News Corporation, confirmed that both journalists work for The Sun tabloid but did not name them.
All three men were arrested on suspicion of misconduct in a public office and conspiracy to commit misconduct.
"Today's arrests are the result of information provided to police by News Corporation's management standards committee," a Scotland Yard spokesman said.
"They relate to suspected payments to a public official and suspected disclosure of confidential information by a police officer."
The three men were arrested under Operation Elveden, one of three Scotland Yard investigations set up in the wake of the phone-hacking scandal at Murdoch's now-closed News of the World tabloid.
Last month, another journalist from The Sun was arrested with a policeman in a raid on grounds of bribery.
The latest arrests bring the number of people arrested under Elveden, the probe into alleged corrupt payments by journalists to public officials, to 50.
A total of 24 people have been held under the phone-hacking probe, Operation Weeting.
Eight people, including Andy Coulson, the ex-News of the World editor and former spokesman to Prime Minister David Cameron, and Rebekah Brooks, the former News International chief, have been charged with phone-hacking.
Australian-born Murdoch, 81, was forced to close the 168-year-old News of the World in July 2011 over revelations that its staff illegally accessed the voicemail messages of a murdered teenager as well as dozens of public figures.
Police have also arrested 13 people under Operation Tuleta, a third probe into computer hacking and breaches of privacy.
Source: AFP, DCMF