What We Know About Savannah Guthrie's Missing Mother Nancy Guthrie

Authorities are still working to identify a potential suspect as they look into alleged ransom notes that have been sent to media outlets.

Nancy Guthrie, the 84-year-old mother of longtime “Today” show host Savannah Guthrie, was reported missing from her home near Tucson, Ariz., on Sunday. Since then, the local sheriff’s department and federal agents have launched a comprehensive investigation into her disappearance, and family members have pleaded for her safe return.

As of Thursday, Pima County Sheriff Chris Nanos said he believed that Nancy was “still out there,” though authorities have not received evidence that provided proof of life.

Earlier this week, investigators said they thought Guthrie had been taken from her home “against her will,” potentially “in the middle of the night.” Nanos added that authorities were treating the incident, which could be a “possible kidnapping or abduction,” as a crime.

In a video posted to social media on Wednesday, Guthrie’s children made a heartfelt plea for their mother’s return and stressed the need for her to receive the medication she requires to survive. They also acknowledged reports of alleged ransom notes that have been sent to local and national media outlets.

“We need to know without a doubt that she is alive and that you have her,” Savannah Guthrie said in a message directed at a potential abductor. “We want to hear from you, and we are ready to listen.”