Investigators have found DNA at the home of Nancy Guthrie, the missing mother of US news anchor Savannah Guthrie, which does not belong to her or those in close contact to her, local officials said.
The Pima County Sheriff's Department said they are working to identify who the DNA belongs to, but would not disclose where it was located.
Investigators also found several gloves, with the closest discovered approximately two miles from Nancy Guthrie's home.
The 84-year-old disappeared in the middle of night from her home in Tucson, Arizona, nearly two weeks ago. Authorities believe she was taken against her will.
The sheriff's department clarified that reports suggesting a glove was found inside her home or on the property are inaccurate.
All collected evidence has been sent for laboratory analysis.
On Thursday, the FBI released a physical description of the suspect, describing them as a male who is between 5ft 9in and 5ft 10in (175-177cm) with an average build.
Investigators have established identifying details about the suspect after analysing footage from a doorbell camera outside Guthrie's home.
The suspect was wearing a 25-litre Ozark Trail Hiker Pack backpack in the footage, the FBI said.
Following the release of the doorbell footage, investigators received over 13,000 tips, including 4,000 in just 24 hours.
The FBI has increased the reward for information regarding Guthrie's disappearance from $50,000 (£36,700) to $100,000.
The county sheriff department stated that the suspect description remains a priority, and they are not dismissing any individuals or possibilities.
Authorities have issued a broader appeal for neighbors to share any relevant video footage.
Police stress that Nancy Guthrie, 84, requires daily medication and has limited mobility.
Savannah Guthrie and her siblings have made social media pleas directed at their mother's abductor, expressing their belief that she is still alive and their willingness to pay for her safe return.
