TUCSON, Ariz. (AP) — “Today” show host Savannah Guthrie is asking for prayers to help bring home her 84-year-old mother, whom authorities in Arizona believe was kidnapped, abducted or otherwise taken against her will.

“thank you for lifting your prayers with ours for our beloved mom, our dearest Nancy, a woman of deep conviction, a good and faithful servant. raise your prayers with us and believe with us that she will be lifted by them in this very moment,” Savannah Guthrie wrote in a social media post late Monday. “Bring her home.”

It’s imperative that Nancy Guthrie be found soon because she could die without her medication, Pima County Sheriff Chris Nanos said, urging whoever has her to free her.

“If she’s alive right now her meds are vital. I can’t stress that enough. It’s been better than 24 hours, and the family tells us if she doesn’t have those meds, it can become fatal,” Nanos said.

For a second day Tuesday, “Today” opened with Nancy Guthrie’s disappearance, but Savannah Guthrie was not at the anchor’s desk. Nanos said during a news conference Monday that Savannah Guthrie is in Arizona. Savannah Guthrie grew up in Tucson, graduated from the University of Arizona and previously worked as a reporter and anchor at KVOA-TV in Tucson.

Nancy Guthrie was last seen Saturday night at her home in the Tucson area, where she lived alone and was reported missing Sunday. Someone at church called a family member saying Guthrie wasn’t there, leading family to search her home and then call 911, Nanos said. The sheriff’s department is investigating the possibility she was taken overnight, spokesperson Angelica Carrillo said.

Nancy Guthrie has limited mobility and officials don’t believe she left on her own. Nanos said she is of sound mind.

Nanos said investigators took some samples they hope will have enough of a "DNA profile that gives us some identification as to what we’re looking at,” KVOA-TV reported.

Searchers used drones and search dogs and were supported by volunteers and Border Patrol. The homicide team was also involved, Nanos said Sunday. The FBI has offered to help, Carrillo said. On Monday morning, Nanos said search crews worked hard but have since been pulled back.

“We don’t see this as a search mission so much as it is a crime scene,” the sheriff said.

Even so, a sheriff’s helicopter flew over the desert Monday afternoon near Nancy Guthrie’s home in the affluent Catalina Foothills area on the northern edge of Tucson. Her brick home has a gravel driveway and a yard covered in Prickly Pear and Saguaro cactus.

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Billeaud reported from Phoenix.