Authorities investigating the disappearance of Nancy Guthrie more than a week ago have released images showing a masked person on her porch on the night she went missing.
Authorities searching for the mother of US 'Today Show' host Savannah Guthrie said they have not identified any suspects of persons of interest.
FBI director Kash Patel posted the images on X.
"The video was recovered from residual data located in backend systems," Mr Patel wrote, saying the images show "an armed individual appearing to have tampered with the camera at Nancy Guthrie's front door the morning of her disappearance".
Investigators had been hopeful that cameras at the home would reveal some evidence about how she went missing, but the doorbell camera was disconnected early on Sunday.
And while software data recorded movement at the home minutes later, Ms Guthrie did not have an active subscription, so none of the footage could be recovered, Pima County Sheriff Chris Nanos had said.
Authorities have released few details about who may have abducted the 84-year-old from her home in Arizona and whether she is still alive, leaving it unclear if ransom notes demanding money with deadlines already passed were authentic and whether the Guthrie family has had any contact with the abductors.
Savannah Guthrie and her family have posted a series of videos over the past week, each striking a different tone. The latest message from Ms Guthrie, in which she appeared alone, was more bleak.
"We are at an hour of desperation," she said yesterday, telling the public: "We need your help."
Authorities believe Nancy Guthrie was taken against her will from her house just outside Tucson.
She was last seen there 31 January and reported missing the next day after she did not attend church.
DNA tests showed blood on her front porch was a match to her, Mr Nanos has said.
The FBI this week began posting digital billboards in major cities from Texas to California.
Connor Hagan, a spokesperson for the FBI, said that the agency was not aware of ongoing communication between Ms Guthrie’s family and the suspected kidnappers.
Authorities also had not identified any suspects or persons of interest, he said.
"Someone has that one piece of information that can help us bring Nancy home," he said.
Source: PA