A viable pipe bomb was seized during a security alert in Newtownabbey, Co Antrim on Saturday night.
Inspector Jim McGrillen said: "The device was located under a railway bridge at Whitehouse Park following a telephone call to police at around 8.50pm."
Residents were evacuated from a number of homes nearby while the device was examined by Army bomb disposal officers.
The alert ended and all residents returned to their homes at around 12.45am on Sunday.
Police are keen to hear from anyone with information regarding this incident.