Relatives of those killed in the 1974 Dublin/Monaghan bombings have accused the Irish and British governments of treating the victims with contempt and arrogance.
John and Jacqueline O'Brien and their two young daughters were shopping in Dublin city centre when they were killed in the Parnell Street car-bomb explosion on May 17, 1974.
Painter and decorator Edward O'Neill also died instantly while his two sons, Ed jnr and Billy, both under 10, were seriously hurt in the loyalist attacks that left 33 people dead and hundreds injured.
The victims's relatives last night (Wednesday) marked the approach of the 29th anniversary of the atrocities by calling on Taoiseach Bertie Ahern and the Irish government to "stop being part of a systematic cover up" of the incident.
The Justice for the Forgotten group, which represents many of those injured and bereaved by the bombs, is also due to hold a briefing on its campaign.
Group members are expected to call on both the Irish and British governments, as well as pro-Good Friday Agreement parties, to commit themselves to the pursuit of truth in relation to the attacks.
They will also report on the progress of Justice Henry Barron's inquiry into the bombings and comment on the significance of the recent report by the Steven's Inquiry.
A wreath-laying ceremony is scheduled to take place at a memorial to the victims in Talbot Street, followed by Mass at the Pro-Cathedral.
The O'Neill and O'Brien families, who are not linked with the relatives' group, issued their own call for Judge Barron's report to be published immediately.
They also called for inquests to be held into the 1974 murders, which sent shockwaves throughout the Republic.
In a statement the families said: "We have been told before that the reason that the Barron report has not been published is as as result of lack of cooperation from the British – this should not come as a shock to anyone in the world.
"We say to Justice Barron, as we have said before, publish and be damned. If the British are not cooperating then publish your report and say so.
"As Irish citizens the public should know that we do not even have the benefit of the basic human rights enshrined in the European Convention on Human Rights.
"Our government has not implemented the convention and it is not part of our domestic law. We are not protected by the 'Right to Life', which means that the Irish state has no legal duty to undertake an effective investigation into the killings."
The O'Neill brothers are still suffering the after effects of the bomb, with Ed last week undergoing surgery to remove shrapnel from his head, elbow and knee in a Dublin hospital. The fragments have been forwarded to Garda headquarters for forensic analysis.
