The army bomb squad has made safe a small viable device in Ballymun in Dublin.
The Defence Forces say the suspect device was found near a car parked outside a private residence in the Belclare Area.
Members of the bomb squad arrived shortly after 1 o'clock this morning and the area was cordoned off by Gardai.
A number of houses were also evacuated as a precaution.
The Army Bomb Disposal team carried out a controlled explosion and the area was made safe at around 3.30am.
Gardai are now investigating the incident.