TUCSON, Ariz. (AP) — A person has been detained for questioning in the disappearance of Nancy Guthrie, according to two people familiar with the matter.

The people said the person was detained in an area south of Tucson on Tuesday. They did not immediately provide additional details, and it wasn’t clear if the person being questioned is the person captured on surveillance video from outside Guthrie’s house released earlier Tuesday.

The people were not authorized to discuss details of an ongoing investigation and spoke to The Associated Press on condition of anonymity.

The FBI released surveillance images of a masked person with a handgun holster outside Guthrie’s front door the night she vanished, offering the first major break in a case that has gripped the nation for more than a week.

The person wearing a backpack and a ski mask can be seen in one of the videos tilting their head down and away from a doorbell camera while nearing an archway at the home of the mother of “Today” show host Savannah Guthrie.

The footage shows the person holding a flashlight in their mouth and trying to cover the camera with a gloved hand and part of a plant ripped from Nancy Guthrie’s yard.