The organisation representing the victims of the Dublin and Monaghan bombings is calling for an inquiry into allegations that British security forces were involved.
Today marks the 34th anniversary of the Dublin and Monaghan bombings.
The single biggest loss of life in one day during the Troubles happened on 17 May 1974, when four car bombs exploded during rush hour without warning. Thirty-four people died in the bombings.
No one has ever been charged with the attacks, which have been described by the Oireachtas Committee on Justice as an act of international terrorism colluded in by British Security Forces.