The Northern Irish Troubles resulted in 14 deaths in or near the County Antrim town of Ballymoney; the sole incident involving two or more fatalities was the Quinn brothers' killings in July 1998. The three Catholic brothers, aged 9, 10 and 11, were killed during a sectarian Ulster Volunteer Force petrol bomb attack on their home at Carnany Park, in a predominantly Protestant area of Ballymoney. The family had only moved into the house the previous week. The mother and her partner escaped, but couldn't save the three children.
References
The Troubles in Ballymoney Wikipedia(Text) CC BY-SA