Authorities are investigating another note regarding the disappearance of Savannah Guthrie's mom, Nancy Guthrie, who has been missing since Jan. 31.

Law enforcement officials in Arizona said Wednesday they have not identified a suspect as they enter the fourth day searching for Nancy Guthrie.

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

Nancy Guthrie was reported missing around noon on Sunday.

Authorities are investigating another note regarding the disappearance of Savannah Guthrie's mom, Nancy Guthrie, who has been missing since Jan. 31.

Investigators explore a new message in the ongoing search for Nancy Guthrie, missing for six days in Arizona.

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

Eight days after Savannah Guthrie's mother was last seen, Nancy Guthrie's family said they \

The deadline on a purported ransom note neared Monday in the disappearance of Nancy Guthrie, the mother of 'Today' show host Savannah Guthrie.