Mystery surrounds the disappearance of Nancy Guthrie, the mother of US TV host Savannah Guthrie.
The 84-year-old went missing from her home in Arizona under suspicious circumstances.
She was last seen at her home near Tucson on Saturday evening and was reported missing the following morning.
Investigators said they had found signs of forced entry and believe she was taken against her will.
In a case that has more questions than answers – here’s everything we know so far.
What do we know about the disappearance?
The NBC News anchor’s mother was last seen at around 9.30pm on Saturday, when she was dropped off at home by family after having dinner with them, the sheriff’s department said.
Ms Guthrie, who lives alone, was then reported missing by her family on Sunday after she did not attend church.
Chris Nanos, the Pima County sheriff, said on Monday: “We don’t see this as a search mission so much as it is a crime scene.”
He said Ms Guthrie has limited mobility and requires daily medication.
“This is not dementia related,” he said. “She’s as sharp as a tack. The family wants everyone to know that this isn’t someone who just wandered off.”
He warned whoever took her that she could die without access to medication.
He said: “If she’s alive right now, her meds are vital. I can’t stress that enough. It’s been better than 24 hours, and the family tells us if she doesn’t have those meds, it can become fatal.”
What do we know about the investigation?
Search and rescue teams were supported by volunteers, Border Patrol, and the homicide team after Ms Guthrie was reported missing, but they were stood down by the end of Monday as the case started to be treated as a criminal investigation.
Police have said there were signs of forced entry at the property, and DNA samples have been gathered and submitted for analysis as part of the investigation.
“We’ve gotten some back, but nothing to indicate any suspects,” Mr Nanos said.
A person familiar with the inquiry told the Associated Press that evidence in the home indicated that she had been kidnapped during the night.
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They said that several of Ms Guthrie’s personal items, including her mobile phone, wallet and her car, had been left in her property.
Investigators do not believe at this point that the abduction was part of a robbery, home invasion or kidnapping-for-ransom plot, the person said.
Police officers have been reviewing information from licence plate cameras and surveillance video from nearby homes while working to analyse data from local phone towers.
Several media organisations reported receiving apparent ransom notes earlier this week that they handed over to police.
The sheriff’s department said it’s taking the possible ransom notes and other tips seriously but has yet to comment further.
What has Savannah Guthrie said?
Savannah Guthrie shared a video on social media in which she addressed her mother’s captor alongside her sister Annie and brother Cameron.
“We are ready to talk,” the anchor said. “However, we live in a world where voices and images are easily manipulated.
“We need to know without a doubt that she is alive and that you have her. We want to hear from you, and we are ready to listen. Please reach out to us.”
She added: “Our mum is our heart and our home. She is 84 years old. 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.
“Mummy, if you are hearing this, you are a strong woman. You are God’s precious daughter.”
Shortly after the video was posted, Donald Trump wrote on Truth Social: “I spoke with Savannah Guthrie, and let her know that I am directing ALL Federal Law Enforcement to be at the family’s, and Local Law Enforcement’s, complete disposal, IMMEDIATELY.
“We are deploying all resources to get her mother home safely. The prayers of our Nation are with her and her family. GOD BLESS AND PROTECT NANCY!”
Savannah Guthrie co-hosts Today, the morning show on NBC News, the US sister network of Sky News.
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She often brought her mother on as a guest. Speaking on the show in 2022 on Nancy Guthrie’s 80th birthday, she said: “She has met unthinkable challenges in her life with grit, without self-pity, with determination and always, always with unshakeable faith.
“She loves us, her family, fiercely, and her selflessness and sacrifice for us, her steadfastness and her unmovable confidence is the reason any of us grew up to do anything.”
