A number of houses were evacuated in Ballymoney, Co Antrim after a loud bang was heard in the early hours of the morning.
A pipe bomb was later found to have exploded near a car at the rear of Carnany Park in the town at about 4 a.m.
British army bomb disposal experts attended the scene. Nobody was injured.
An RUC spokeswoman said it is not believed the incident was sectarian.
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Carnany Park is where boys Richard, Mark and Jason Quinn were killed in July 1998 by a loyalist petrol bomb. The boys, who had a catholic mother, died when their house was set on fire during the Drumcree protests.