A wreath-laying ceremony will take place in the city centre this afternoon to mark the 43th anniversary of the Dublin and Monaghan bombings, in which 34 people were killed on the worst single day of violent deaths during the Troubles.
The ceremony will be held at the memorial to the victims in Talbot Street at 12.30pm.
The UVF admitted carrying out the bombings in 1994 but relatives of the dead and wounded still believe many questions have been left unanswered.
The families of the people who lost their lives founded the Justice For The Forgotten organisation in 1996.
The group has continued to press the government for a public inquiry into the truth behind the bombings ever since.
Many experts believe the UVF were helped by British intelligence.
A private inquiry into the bombings was set up in 2003 by retired Judge Henry Barron but the British authorities refused to co-operate and provide the necessary files and information.
As a result his findings were inconclusive.
In July 2004 the Irish government agreed to set up a commission of inquiry into the bombings.
No-one has ever been charged with carrying out the atrocities.
In March survivors and relatives of the victims went about seeking full disclosure in a legal action over alleged British government collusion with loyalists behind the attack.
They have requested a High Court order for the Ministy of Defence, Northern Ireland secretary and PSNI to serve their defences to claims lodged two years ago.
Margaret Urwin, representative of Justice For The Forgotten, hopes the families will finally find out the truth.
“For 40 years since the atrocities we have fought to get the authorities to release all of the archive documents which would help bring closure for the bereaved and injured.
“We really hope the High Court in Belfast will intervene and make the necessary orders.”
The oration will be given by Denis Bradley, former vice-chairman of the Northern Ireland Policing Board and former co-chairman of the Consultative Group on the Past.