Nancy Guthrie abduction timeline: Person detained for questioning

Authorities on Tuesday released photos and video of an "armed individual" seen outside Nancy Guthrie's front door the morning of her disappearance.

A more detailed timeline is emerging more than one week into the search for 84-year-old Nancy Guthrie, the mother of "Today" show host Savannah Guthrie, who investigators say appears to have been kidnapped from her Tucson, Arizona, home.

Here's a timeline of the mysterious case:

5:32 p.m.: Nancy Guthrie took an Uber to her daughter’s home for dinner, Pima County Sheriff Chris Nanos said. Investigators have spoken with the Uber driver, he said.

9:48 p.m.: Nancy Guthrie was dropped off at home by her family, Nanos said. Her garage door opened at approximately 9:48 p.m. and her garage door closed at 9:50 p.m., he said.

Investigators believe Nancy Guthrie was abducted in her sleep early Sunday morning, according to the sheriff's department.