United Kingdom, July 28 -- Savannah Guthrie has made a fresh plea to her mother's abductors, begging them to "do the right thing".

The Today host and her siblings, Annie and Camron, previously reported their 84-year-old mom Nancy Guthrie missing, after she disappeared from her home in Tucson, Arizona in the early hours of 1 February, and Savannah admits their mother's disappearance has left her family in "agony".

The FBI are investigating Nancy's case as a kidnapping for ransom, and Savannah has taken to Instagram with a "very specific message" for her mom's abductors, pleading with them to "make the right choice".

In a video on Instagram, she said: "It has been months since our mom was taken from us.

"Our family is in agony. We are i...