Savannah Guthrie speaks out on reports of ransom letters for missing mom

Savannah Guthrie and her siblings are addressing reports that media outlets have received unverified ransom letters as their mother remains missing for a fourth day.

Sitting between her sister Annie Guthrie and brother Camron Guthrie in an emotional four-minute video, Savannah Guthrie said, "We, too, have heard the reports about a ransom letter in the media."

As she continued, she appeared to speak directly to a possible kidnapper.

"As a family, we are doing everything that we can. We are ready to talk. However, we live in a world where voices and images are easily manipulated. We need to know without a doubt that she's alive and that you have her. We want to hear from you and we are ready to listen. Please reach out to us," Savannah Guthrie said.

The "Today" show cohost emphasized 84-year-old Nancy Guthrie's medical needs as she said, "Her health, her heart, is fragile. She lives in constant pain. She is without any medicine. She needs it to survive. She needs it not to suffer."

Annie Guthrie added, "Mama, if you're listening, we need you to come home. We miss you."

Watch Savannah Guthrie's family's video statement

What we know about possible ransom letters

During the afternoon of Feb. 3, the Pima County Sheriff's Department confirmed in a statement released on social media that it was "aware of reports circulating about possible ransom note(s)" and that it was "taking all tips and leads very seriously. Anything that comes in goes directly to our detectives who are coordinating with the FBI."

CBS News reported that its Tucson affiliate, KOLD News, received a letter on Feb. 2. Without specifying which news station received the communication or confirming its veracity, Pima County Sheriff Chris Nanos told CBS News that the letter "contained specific details about the home and what Nancy Guthrie was wearing that night."

Nanos told CBS News that the FBI had reviewed the note and shared it with Savannah Guthrie. On Feb. 3, TMZ reported that it had received an alleged letter demanding payment for the release of Nancy Guthrie. The USA TODAY Network has not viewed or substantiated the validity of either note.

On Feb. 4, authorities said a suspect or person of interest had not been identified.

Nancy Guthrie's family reported her missing on Sunday, Feb. 1, from her home in the Catalina Foothills community just north of Tucson, according to the Pima County Sheriff's Department. She was last seen the prior evening, around 9:45 p.m. on Saturday, Jan. 31, Nanos said in a Feb. 2 press conference.

On Monday, Feb. 2, authorities confirmed investigators believed Nancy Guthrie "was taken from the home" and said the case was being considered as a "possible kidnapping or abduction." The FBI is assisting in the investigation.