Nancy Guthrie, 84, was kidnapped on Sunday, Feb. 1.
The search is ongoing 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 in the early hours of Sunday, Feb. 1.
The FBI has released photos and videos of an armed person in a mask in front of her home, appearing to tamper with a security camera.
Anyone with information is urged to call 911 or the Pima County Sheriff's Department at 520-351-4900.
Click here for the detailed timeline of the investigation into Nancy Guthrie's disappearance.
The FBI has reached out to Mexican authorities to make them aware of Nancy Guthrie’s disappearance, law enforcement sources told ABC News.
There is no evidence she was taken across the border, but it’s an avenue investigators are exploring given the proximity to Tucson, Arizona, the sources said.
-ABC News’ Aaron Katersky and Luke Barr
Investigators are looking into genetic genealogy options to check for matches against DNA from a set of gloves found 2 miles away from Nancy Guthrie's property, the Pima County Sheriff's Department said Tuesday.
No DNA match was found in the national database known as CODIS or at the property, the department said in an update, noting that CODIS is "one option of many databases that are available."
DNA found at Nancy Guthrie's property is also being analyzed and "further testing needs to be done as part of the investigation," the department said.
The FBI ran DNA from a glove found during a roadside search through the national database known as CODIS, and did not get a match to any of the roughly 22 million samples in the database, according to the Pima County Sheriff's Department.
That glove -- which was found about 2 miles from Nancy Guthrie's house -- also did not match DNA found at Guthrie’s property, law enforcement sources told ABC News.
The DNA found at the property is being analyzed and further testing needs to be done on it, the sources said.
-ABC News’ Aaron Katersky
Pima County Sheriff Chris Nanos told Phoenix ABC affiliate KNXV on Tuesday that the motive for Nancy Guthrie’s abduction remains unknown, and investigators don’t know if it was a kidnapping or a burglary gone wrong.
When asked if there is any evidence that Guthrie is alive, Nanos said there's been no evidence that she is not alive.
Nanos also said that the two men who were briefly detained as part of the investigation are not suspects.
The sheriff said he believes authorities have received over 30,000 tips.
-ABC News’ Alex Stone
