Associates and pals of slain Real IRA figure Alan Ryan will attend a commemoration at Balgriffin Cemetery to mark the third anniversary of his murder on Saturday, September 5.
The event is being organised by the 32 County Sovereignty Movement and well known Republican Francis Mackey is due to deliver a graveside oration.
Sources said that gardai are aware of the event and a special policing plan will be put in place on the day involving members of the Special Detective Unit and local officers.
People attending the commemoration are due to meet at Donaghmede Church before marching to Ryan's grave at Balgriffin Cemetery.
Francis Mackey, who will give the main graveside speech, is the chairperson of the 32 County Sovereignty Movement.
Last September he also gave a graveside oration before Ryan's brothers Dermot and Vincent laid a wreath reading "RIP Alan".
Earlier that week blood-red graffiti, which read "Alan Ryan rot in hell", was daubed on the side of the Holy Trinity Church in Donaghmede leading to an increase in tensions in north Dublin.
Apart from Ryan's family, some of his best friends are expected to attend the event including under-threat men Derek Nolan and Dean Evans.
No one has ever been charged with the murder of Ryan, who was killed as part of a dispute between a dangerous drugs mob and the IRA.
The feud between the factions is still ongoing but there has been no major incident attached to it for many months and the situation is continually monitored by gardai.
The Herald previously revealed that an IRA gang has a car ready to be used to kill the Coolock gangster who is suspected of organising the murder.
The IRA has been dealing with a number of bitter internal feuds, particularly in Northern Ireland, and multiple investigations by the Special Detective Unit - which has led to many of the main players in the organisation being arrested and charged before the courts on both sides of the border.
The garda investigation into Ryan's murder on September 3, 2012, is still active and it is understood that a file on the case is almost ready to be sent to the DPP.
At the latest adjourned inquest hearing into the case in June, a solicitor representing Ryan's family at Dublin Coroner's Court said it was "simply unacceptable" it has taken gardai so long to complete the file.