Nancy Guthrie, the 84-year-old mother of Savannah Guthrie, was last seen by her family on Jan. 31.

The 84 year-old mother of Savannah Guthrie, the popular co-host of the NBC news show Today, was last seen at her Arizona home on Saturday night.

Authorities are still working to identify a potential suspect as they look into alleged ransom notes that have been sent to media outlets.