Army bomb disposal experts made safe a viable explosive device in north Dublin last night.
The device was discovered in a stolen car outside a house at Marigold Court in Darndale at around 7pm.
A man was arrested and is being detained at Coolock Garda station under Section 30 of the Offences Against the State Act.
A number of houses in the area were evacuated and the all clear was given at 8.50pm.
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A Defence Forces spokesman said the device "did contain explosive content".
The spokesman said the remains of the device would be handed over to gardaí for examination.