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A dig of a hillside near where Cal Poly San Luis Obispo student Kristin Denise Smart was last seen alive 20 years ago recovered remains and they are being analyzed to determine whether they human or animal, local sheriff’s officials said.

But two sources familiar with the investigation, but not authorized to discuss it, said the bones are most likely animal.

FBI agents and sheriff’s deputies from San Luis Obispo County spent five days digging up three locations on the hillside last week.

“We are saying the remains that were recovered are being analyzed to see if they are animal or human and if they are related to the Kristin Smart case,” Tony Cipolla, a sheriff’s spokesman said.

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