The search for 84-year-old Nancy Guthrie, the mother of “Today” host Savannah Guthrie, began after she was abducted from her home near Tucson, Arizona, on Sunday, Feb. 1, authorities said.
The Guthrie family has made multiple public pleas for any information surrounding their missing mother.
Here’s how the news is developing.
Timeline of Nancy Guthrie’s disappearance and investigation
Investigators believe Nancy Guthrie was abducted in her sleep early on Feb. 1, according to the sheriff’s department.
1:47 a.m.: Nancy Guthrie’s doorbell camera disconnected, the sheriff said.
2:12 a.m.: The camera software detected a person on camera, but no video is available, the sheriff said.
11:56 a.m.: Relatives responded to Nancy Guthrie’s home and discovered she was missing, the sheriff said.
12:03 p.m.: The family called 911, the sheriff said.
Click here for a full timeline of the case.

Person detained for questioning in Guthrie case
The Pima County Sheriff’s Department, with assistance from the FBI, has detained an individual for questioning in connection with the abduction of Nancy Guthrie, a law enforcement official briefed on the investigation told ABC News.
The individual was detained in a location south of Tucson, the source said, and law enforcement is preparing to search a location associated with the individual.
The development followed the first images released of a masked man approaching Nancy Guthrie’s front door and as investigators continued to search in her neighborhood.