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Earlier in the day police revealed they had released an individual taken into custody at the acreage Friday night.

Calgary police said he remains a “person of interest” and several police units will continue to search a residence connected to him on the outskirts of Airdrie.

Investigators say that, given the size of the property, the search is likely to continue throughout Sunday and into Monday as they search for clues in the disappearance a week ago of Nathan O’Brien and his grandparents — Alvin and Kathy Liknes.

Acting on a tip police arrived at the property late Friday night and found a green Ford F-150 truck similar to one spotted in a video taken near the Liknes home.

Police say they are trying determine if the truck, the property, or the man taken in for questioning, are linked to the investigation.

Five-year-old Nathan O’Brien and his grandparents disappeared from their Calgary home on Monday after the couple had been holding an estate sale.

Police confirmed Friday that there was evidence that a violent incident had occurred in the Liknes’ Calgary home.

Staff-Sgt. Doug Andrus would not confirm whether the evidence found in the Liknes’ tidy suburban home was blood.

“We don’t have a motive at this point,” Andrus said. “We have a number of theories we’ve developed over the course of the investigation, and we’re going to continue to work on those theories.”

Police say they want to hear from anyone who has any information regarding the whereabouts of the missing people or recognizes the pickup that was captured on video in the area of the grandparents’ home.