PIMA COUNTY, Ariz. -- 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.
On Feb. 10, the FBI released an updated missing person poster that includes images of a potential subject from newly released doorbell camera video.
Anyone with information is urged to call 911 or the Pima County Sheriff's Department at 520-351-4900.
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.
Nearly two weeks since Nancy Guthrie's abduction, sources in contact with the circle of family and friends around Savannah Guthrie describe a growing feeling of "intense frustration" with the pace of the investigation and the limited amount of information coming from investigators.
The FBI released new details about the suspect sought in the kidnapping of Nancy Guthrie, who was seen outside her front door early on Feb. 1, armed while wearing a backpack, mask and gloves.
"The suspect is described as a male, approximately 5'9" - 5'10" tall, with an average build," the FBI said Thursday. "In the video, he is wearing a black, 25-liter 'Ozark Trail Hiker Pack' backpack."
The FBI released several images of the type of backpack worn by the suspect alongside a still from Nancy Guthrie's doorbell camera video.
The FBI said it confirmed the new details "after a forensic analysis of the doorbell camera footage."
"We hope this updated description will help concentrate the public tips we are receiving," the FBI said.
The FBI announced Thursday it has increased the reward for information leading to Nancy Guthrie and/or the arrest and conviction of anyone involved in her disappearance to $100,000.
The reward was previously $50,000.
Since Feb. 1, the FBI said it has received more than 13,000 tips in the case.
The Pima County Sheriff's Department said "several items of evidence" have been recovered, including gloves. The evidence is being analyzed, authorities said.
The sheriff's department also said it is using the Neighbors app to reach out to residents who live within 2 miles of Nancy Guthrie. The department said it's requesting any video footage from Jan. 1 to Feb. 2 "that includes vehicles, vehicle traffic, people/pedestrians, and anything neighbors deem out of the ordinary or important to our investigation."
