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.
ABC News has confirmed that law enforcement will imminently release an image of a potential suspect in the disappearance of Nancy Guthrie, the 84-year-old mother of "Today" show host Savannah Guthrie.
Guthrie was taken from her home in Tucson, Arizona, on Sunday, Feb. 1, according to authorities. A Monday ransom deadline by persons claiming to be Guthrie's abductors passed as the search for her continues.
The search for Nancy Guthrie entered a tenth day on Tuesday.
The FBI said Monday that it has not yet identified a suspect or person of interest in the case and is "not aware of any continued communication between the Guthrie family and suspected kidnappers."
"We are currently operating a 24-hour command post that includes crisis management experts, analytic support, and investigative teams. But we still need the public's help," the FBI said in a statement. "Someone has that one piece of information that can help us bring Nancy home."
Anyone with information is urged to call 911, the Pima County Sheriff's Department at 520-351-4900 or the FBI at 1-800-CALL-FBI.
Savannah Guthrie on Monday released a new direct plea to the public, begging for help to find her mom.
"We are at an hour of desperation, and we need your help," Savannah Guthrie said in an Instagram video, speaking directly to the camera.
"We believe our mom is still out there. We need your help," she said. "Law enforcement is working tirelessly, around the clock, trying to bring her home."
"She was taken, and we don't know where, and we need your help," she said. "So I'm coming on just to ask you ... no matter where you are ... 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."
Savannah Guthrie thanked everyone for their prayers and love, and said she believes her mom is feeling those prayers, too.
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.
