Investigators in the disappearance of "Today" show co-host Savannah Guthrie's mother,Nancy Guthrie, haven't identified a suspect or person of interest in the Arizona case, which is being investigated as a crime, authorities said Wednesday.
The Pima County Sheriff's Departmentposted the updateto social media as the search continues for Nancy Guthrie, 84, who was reported missing Sunday.
"Detectives continue to speak with anyone who may have had contact with Mrs. Guthrie," the sheriff's department said in Wednesday's statement.
Authorities believeGuthrie was takenfrom her Tucson, Arizona, home over the weekend. Alittle bit of bloodfound inside the home was being tested, a law enforcement source familiar with the case told CBS News.
"Detectives are working closely with the Guthrie family," the sheriff's department said in its statement Wednesday. "While we appreciate the public's concern, the sharing of unverified accusations or false information is irresponsible and does not assist the investigation."
Pima County Sheriff Chris Nanos said Tuesday that evidence collected from the home hadn't yet pointed toward a suspect. He also said it wasn't clear how many people took Guthrie. "It could be one, it could've been more, I don't know," he said.
Guthrie's family reported the disappearance to authorities Sunday after looking for her at her home when they were told Guthrie missed church that morning.
Nanos told CBS News on Tuesday that a ransom note was sent to a local Arizona news station following Guthrie's disappearance.
The note, which the station received Monday and agreed not to report on, contained specific details about the home and what Guthrie was wearing that night, Nanos said, although he would not confirm the accuracy of that information or the legitimacy of the note.
Nanos did not specify which station the note was sent to, but CBS affiliateKOLD-TVreported Tuesday it had received an email that "appears to be one of the alleged ransom notes," which it forwarded to the sheriff's office.
Investigators have analyzed the note and are taking it seriously, Nanos said.
Nanos told CBS News that Guthrie ate dinner Saturday at the home of her other daughter, Annie Guthrie, who lives near her mother. Her husband, Tommaso Cioni, drove Nancy Guthrie home afterward, Nanos said. The details were first reported byThe New York Times. Earlier this week, Nanos toldUs Weeklythat Annie Guthrie was the last known person to see her mother before the disappearance.
Nanos has dismissed the possibility that Nancy Guthrie, who lives alone, may have wandered away from her home because he said she doesn't have any cognitive issues and her mobility is limited.
Nancy Guthrie has three children in total: Annie Guthrie, Savannah Guthrie and son Charles Guthrie.
Investigators hadn't determined whether Nancy Guthrie was targeted or if the abduction was random, Nanos said Tuesday.
As investigators sort through hundreds of leads, Nanos has said there's additional urgency to the search effort because Guthrie needs daily medication. The FBI is working with the sheriff's department and providing support, an official said Tuesday.
A White House official told CBS News that President Trump spoke with Savannah Guthrie in a phone call Wednesday. The official didn't provide details about the call.
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