Nancy Guthrie latest: Savannah Guthrie pleads with public, 'We need your help'

The Guthrie family faces a deadline this evening to pay an unverified ransom in exchange for the safe return of Nancy Guthrie. The 84-year-old mother of Today Show host Savannah Guthrie was abducted from her Arizona home last Sunday. Despite the intense search, authorities have no known suspects or leads. ABC's Melissa Adan with the latest now and the latest message from the Guthrie family. The search for missing 84-year-old Nancy Guthrie now in its ninth day. The Guthrie family faced with a deadline of 5 p.m. Mountain Time to pay an unverified ransom, alleging to be from Nancy's kidnapper. We are at an hour of desperation, and we need your help. Local and federal investigators in Arizona combing all corners of Nancy Guthrie's property, examining rooftop cameras, pulling a car, and inquiring of neighbors. If you see anything, if you hear anything, if there's anything at all that seems strange to you, that you report to law enforcement. Over the weekend, investigators examining what appears to be the septic tank on Nancy's property north of Tucson. Detectives also returning to the home of Savannah's sister, Annie, the last place Nancy was seen alive on January 31st. The Pima County Sheriff's Department says this remains an active and ongoing investigation. But after more than a week, investigators have not identified any suspects, persons of interest, or vehicles connected to this case. As we go past today, the investigators, the FBI, and the county police, and others, will continue to work this case as hard as they can. At some point, there'll be a leak, and it's a tragic thing to go tell a family. The FBI is offering a $50,000 reward for any information leading to Nancy Guthrie's whereabouts. In Los Angeles, Melissa Donne, Channel 6 Action News.