(NEW YORK) -- Faced with a demand for a bitcoin ransom and a Monday deadline by someone claiming to be her mother's kidnapper, "Today" host Savannah Guthrie and her siblings over the weekend solemnly pledged to pay for the return of their mother, Nancy.
"We are aware of the video posted by the Guthrie family. But don't have any additional information to share," a spokesperson for Pima Sheriff said in a statement to ABC News on Saturday following the release of the latest video from the family.
ABC News' Nadine El-Bawab contributed to this report.