TUCSON, Ariz. — The search for Nancy Guthrie, the mother of 'Today' show anchor Savannah Guthrie, has entered its fourth day with no suspects or persons of interest identified, authorities announced on Wednesday. Nancy was reported missing from her home in Tucson, Arizona, after signs of forced entry were discovered.

Investigators believe that she might have been taken against her will. Pima County Sheriff Chris Nanos stated that there is currently no credible evidence suggesting that her disappearance was targeted. Noting Nancy's limited mobility, officials are leaning towards the belief that she did not leave voluntarily.

Detectives are engaging with anyone who may have interacted with Mrs. Guthrie and continue to collaborate closely with the family, the sheriff's department conveyed in a social media update.

In a concerning development, various media outlets reported receiving potential ransom notes on Tuesday, which were subsequently turned over to investigators. The Pima County Sheriff’s Office is treating these communications seriously but has remained tight-lipped about any details surrounding them.

During a news brief on Tuesday, authorities urged the public to provide tips, emphasizing the urgency due to Nancy's need for regular medication. Sheriff Nanos expressed hope, stating, We hope we are looking for her alive.

Nancy was last seen late Saturday evening and was reported missing around midday on Sunday when a church member notified her family that she had not attended services. Upon their search of her home, they contacted law enforcement.

Officials are collecting DNA samples to assist with the investigation but have reported that preliminary results have not yet pointed to any suspects. Signs of forced entry suggest a possible night-time abduction, with Nancy's personal effects—including her cellphone, wallet, and vehicle—still at her residence.

As detectives continue their work, the disappearance has prompted NBC’s 'Today' to open its segments discussing Nancy’s case, although Savannah Guthrie has opted to step away from reporting duties to support her family during this challenging time. Savannah, originally from Tucson, has a personal connection to this community, having lived there since childhood.