In this undated file photo provided by the Tennessee Bureau of Investigation, Holly Bobo is shown.NASHVILLE - Authorities are investigating possible human remains in the county where a Tennessee nursing student disappeared in 2011.
Tennessee Bureau of Investigation spokesman Josh DeVine told The Associated Press on Sunday that investigators were in Decatur County, the same county where 20-year-old Holly Bobo disappeared from her family's home in Parsons.
DeVine didn't have a specific location in the county, and said officials are not connecting the remains to Bobo.
However, according to media reports, a skull was found not far from property owned by the family of Zach Adams, who is charged with kidnapping and murder in the Bobo case.
Adams and Jason Autry, who faces similar charges in the case, have both pleaded not guilty.
Two brothers, Jeffrey Kurt Pearcy and Mark Pearcy, also face charges of tampering with evidence and accessory after the fact in the case.
In this 2014 file photo, a poster with pictures of missing Tennessee nursing student Holly Bobo hangs on a fence in front of her house in Parsons, Tenn.