India, Sept. 6 -- Nancy Guthrie Case Latest Update Today: The investigation into the disappearance of 84-year-old Nancy Guthrie is continuing, with the FBI adjusting its operations in Arizona nearly three-and-a-half weeks after she was abducted from her Tucson home. According to sources briefed on the investigation who spoke to ABC News, the FBI is reducing the number of personnel stationed in Tucson and moving its command post to Phoenix.

The change in the FBI's operational setup does not mean the investigation has ended or that authorities are abandoning the search for Guthrie. Agents will remain in Tucson and continue working with the Pima County Sheriff's Department as investigators pursue leads in the case.

Nancy Guthrie Case Lates...