Search continues for Savannah Guthrie's mom: 'We don't know where she is,' sheriff says

It's now been more than three days since the mother of today's show host, Savannah Guthrie, went missing. Officials say they believe Nancy Guthrie was taken against her will. Police have not announced any suspects, and they're now looking into potential ransom notes. ABC's Rena Roy has the latest. Growing concern for today's show host, Savannah Guthrie's 84-year-old mother, Nancy Guthrie. We don't know where she is. Tucson law enforcement saying they believe she was abducted from her home in the middle of the night. And now we're hearing police dispatch audio when Guthrie was reported missing Sunday morning after she didn't show up to church. Do we have a description yet of the subject? 84-year-old female, unknown clothes, not super mobile, possibly walking with a cane. Authorities concerned about her health with her family, saying her cell phone and life-saving medication were both left behind. High blood pressure, pacemaker, and cardiac issues. Investigators say they're looking into hundreds of tips, including potential ransom notes. ABC affiliate KGUN says they received one possible note. And now authorities say they're working to determine if any are legitimate. While there are security cameras at the home, investigators say they still haven't been able to access the footage. And one camera that was attached to the front of the home is missing. The sheriff says at this point, no DNA results have identified any suspects. A sign left outside the Guthrie home saying, your neighbors stand with you. The disappearance rocking the Tucson community. I could not imagine that happening to anybody. And then the family, what they're going through is going to be horrific. I hope for the best. I hope that this comes to a great resolution. Savannah Guthrie says her family is focused on the safe return of their mother. Posting on Instagram this week, please pray and bring her home. Reena Roy, ABC News, New York.