The Foreglen Road in Dungiven has now re-opened following an earlier security alert.
North Area Engagement Chief Inspector Mullan said: “A suspected pipe bomb was located on Friday 17th July.
“Ammunition Technical Officers (ATO) attended the scene. They carried out a controlled explosion, and later deemed the device to be viable.
“The remnants of the item have now been taken away for forensic examination.
“We would like to thank the public for their patience and cooperation as searches in the area were carried out overnight and into this morning. Closing roads causes disruption and inconvenience but, ultimately, public safety is our priority.
“Our enquiries remain ongoing and anyone with information which could assist with our investigation is asked to contact police on 101 quoting reference number 304 17/07/26.”
A report can also be submitted online at https://reporting.psni.police.uk/appeals or you can also contact Crimestoppers anonymously on 0800 555 111 or online at http://crimestoppers-uk.org/