Cops in Tucson, Arizona, rushed to investigate human remains that a streamer discovered in a wash less than five miles from Nancy Guthrie’s home Thursday – but they appear to be at least 50 years old, possibly even “prehistoric.”

The bone was discovered by a livestreamer searching the area for the missing mother of “Today” show host Savannah Guthrie, with the area quickly being cordoned off by police.

It was soon confirmed the bone was human – but officials said it they appeared to be far older than 84-year-old Nancy, who hasn’t been seen since vanishing from her home in February.

“This will be a prehistoric anthropological investigation,” Tucson Police Department told KVOA, confirming there was no criminal investigation into the remains.

The University of Arizona’s Anthropology Department is helping with the investigation.

The area where the bone was discovered was near a site where numerous Native American artifacts have been discovered.