Forty years ago a series of bombs exploded in the Republic of Ireland in the single bloodiest day in the period known as the "Troubles".

Thirty-three people were killed in attacks in Dublin and Monaghan by Northern Irish loyalists, the Ulster Volunteer Force.

Relatives of the victims and survivors said this week they would sue the UK government, claiming it covered up involvement by British troops in the loyalist gangs responsible for the attack.

Al Jazeera's Laurence Lee reports from Dublin.

Source: Al Jazeera