The Crown Prosecution Service was today given four files involving four journalists relating to the phone hacking inquiry Operation Weeting, for charging decisions.
The files relate to allegations of offences under the Regulation of Investigatory Powers Act and bring the total handed over to prosecutors to 18.
A CPS spokesman said: "We are not prepared to discuss the identities of those involved or the alleged offences in any greater detail at this stage as a number of related investigations are ongoing.
"We are unable to give any timescale for charging decisions, except to say that these cases are being considered very carefully and thoroughly, and the decisions will be made as soon as is practicable."
The CPS has launched prosecutions relating to just one file so far - including former News International chief executive Rebekah Brooks and her racehorse trainer husband Charlie, who were charged with perverting the course of justice.
They will appear at Southwark Crown Court alongside four others tomorrow.
Three other files, one involving Guardian journalist Amelia Hill, one relating to former News of the World chief reporter Neville Thurlbeck, and one relating to Guardian journalist David Leigh, have been dropped.
As well as today's four cases, 10 others are still being considered for charging advice:
:: A police officer in relation to an allegation of misconduct in public office.
:: A police officer in relation to an alleged offence of misconduct in a public office, and other associated matters.
:: A police officer in relation to allegations of misconduct in public office and corruption.
:: Seven journalists, all in relation to allegations of offences under RIPA.
