Loyalist terrorists in the North have issued threats against journalists working for the Sunday Life and Sunday World newspapers.
A number of reporters were visited by police officers yesterday and warned of imminent attacks.
At least one journalist was told of a planned under-car booby trap, while staff at the two Sunday titles - both owned by Independent News and Media (INM), publishers of the Herald - were warned they are at risk of immediate attack.
The development comes just weeks after the first anniversary of the New IRA murder of journalist Lyra McKee in Derry.
The PSNI is taking the threats seriously and officers have been in contact with the journalists concerned.
It is understood the threats emanate from the breakaway South East Antrim UDA.
Members of the South East Antrim UDA have been linked to the murder in January of Glenn Quinn (47), who was found in his flat in Carrickfergus, Co Antrim.
Police have confirmed they are "in receipt" of information that indicates a planned and co-ordinated campaign of intimidation.
Peter Vandermeersch, publisher at INM, said: "We will, of course, work with the police to ensure our staff's safety.
"Threats against journalists should not be tolerated in any free society. As we mark the 75th anniversary of the defeat of Nazi Germany, an important element in that victory was ensuring freedom of speech for subsequent generations. It is depressing that thugs still believe they can silence the press through intimidation."