Families of those killed in the Dublin and Monaghan bombings are to launch a High Court challenge over the official investigation into the atrocities.
The Irish Government established the Commission of Investigation: Dublin and Monaghan Bombings 1974 in May 2005 under Patrick McEntee to report on why a Garda inquiry into the atrocities was wound down and whether collusion was involved.
A total of 33 people - including a pregnant woman - died and 300 were injured when four car bombs exploded in Dublin and Monaghan. It was the highest death toll on a single day during the Troubles.
No organisation claimed responsibility but loyalist paramilitaries were blamed and there have been persistent allegations that elements within the British military colluded in the atrocities.
The final report of the commission, which was published earlier this month, found no evidence of collusion in the winding down of Garda investigations into the atrocities in May 1974.
Justice for the Forgotten, a group which represents the victims of the bombings, said this afternoon that it was taking a High Court challenge against the Taoiseach and the Attorney General challenging aspects of the investigation findings.
The group claims that the Commission of Investigation failed to report on parts of its Terms of Reference and added that it had not been allowed access to evidence gathered for the investigation.
