The search began last week.
An axle found during a search at a quarry on the Wicklow-Kildare border is to be forensically examined.
It was found during excavations linked to the murders of Jo Jo Dullard and Deirdre Jacobs who disappeared within years of each other in the 90's.
The search began last week on foot of information given to Gardai linking the site with a person of interest in one of the murders, who may have buried cars there.

Analysis: Damning Reports Detail Rot, Fire Risks And Rodents At "Temporary" Celbridge Primary School
Kfm Obituary Notices
Major Curragh Community College Project Moves Ahead After Years Of False Starts
Plans For Walking Trail Within Castletown House Lands Under Consideration Subject To Removal Of Laurel
Council Blames Stolen Cars As It Refuses Warning Signs At Crash-Prone Bridge In Celbridge
Naas No-Shows Add To Driving Test Pressure As Kildare Test Queue Hits 1,975
Naas Hospital Promised Just 21 Extra Mental Health Beds At Lakeview Ward - With No Timeline In Sight
R405 Hazelhatch Road To Close Between Loughtown Road And Athgoe Road For Major Pipeline Works