Volkswacht Bodensee - US TV star details 'agony' over mother's disappearance

"Someone needs to do the right thing. We are in agony. We are in agony. It is unbearable," popular morning show presenter Savannah Guthrie said in an interview with fellow NBC News anchor Hoda Kotb.

Nancy Guthrie, 84, disappeared from her home in Tucson, Arizona in the early hours of February 1. Security camera footage released by authorities showed a masked, apparently armed man at her house, but since then the trail has gone cold.

No suspect has been identified and announcements of potential clues -- including discarded gloves -- have not led to further progress.

"To think of what she went through. I wake up every night in the middle of the night, every night," Savannah Guthrie said, tears streaming down her face.

"In the darkness, I imagine her terror. And it is unthinkable, but those thoughts demand to be thought. And I will not hide my face. But she needs to come home now."

Savannah Guthrie's comments came in a clip shared on her television show, Today, with the network saying other parts of the interview would be released on Thursday and Friday.

Savannah Guthrie previously offered $1 million for a tip leading to the recovery of her mother, acknowledging that "she may already be gone."

The FBI has offered $100,000 for information.

The Today show is something of a US institution, airing nationally since 1952 and drawing millions of viewers to NBC on weekday mornings.

T.Egger--VB