Tucson: Nancy Guthrie, the 84-year-old mother of US TV presenter Savannah Guthrie, has been missing for more than a week after investigators say she was abducted from her home near Tucson, Arizona. New doorbell footage released by the FBI shows a masked, armed person tampering with her camera, while authorities continue to appeal for public help.

Who is Nancy Guthrie and what is happening?

Nancy Guthrie is the 84-year-old mother of US TV presenter Savannah Guthrie, best known as a co-anchor of NBC’s Today show. She has been missing since the evening of 31 January, when family members dropped her off at her home in the affluent Catalina Foothills area near Tucson, Arizona.

Authorities believe she was abducted from her home, and the case has sparked widespread media attention and emotional public appeals from her family. Investigators have recovered blood from her porch that DNA tests confirmed belonged to Nancy, and they are also investigating ransom notes with deadlines that have already passed.

The FBI has released surveillance footage showing a masked, armed person tampering with the front-door camera on the night of her disappearance, and has offered a $50,000 reward for information. The case has prompted national attention, with the White House reportedly monitoring the investigation.

Timeline of Nancy Guthrie’s disappearance

On 31st January

5:32pm – Nancy Guthrie takes an Uber to her family home for dinner.

9:48pm – A family member drops her off at her Tucson home. The garage door opens and closes shortly afterwards.

On 1st February

1:47am – The doorbell camera is disconnected.

2:12am – The camera detects movement. Investigators initially said there was no footage because Guthrie did not have an active subscription, but digital experts continued to search for images in the system’s backend.

2:28am – Guthrie’s pacemaker app disconnects from her phone.

11:56am – Her family checks on her after learning she did not attend church.

12:03pm – The family calls 911 to report her missing.

12:15pm – Investigators arrive and launch a search, including drones and search dogs.

6:46pm – The Pima County Sheriff’s Department announces her disappearance on social media.

Authorities later state they believe she was abducted against her will.

Ransom notes and public appeals

KOLD-TV reports it received an email appearing to be a ransom note, with deadlines set for 5pm Thursday and the following Monday.

Savannah Guthrie posts multiple video appeals on social media, pleading for her mother’s safe return and asking for proof she is alive.

Officials confirm blood found on the front porch belonged to Nancy Guthrie following DNA testing.

ALSO READ | ‘We will pay,’ US TV anchor Savannah Guthrie says in desperate video plea to mother’s kidnappers

The FBI offers a $50,000 reward for information.

New evidence and developments

The FBI later releases doorbell camera footage showing an armed person tampering with the camera. The suspect is seen wearing a ski mask, backpack and gloves, and attempting to block the camera’s view with a plant.

Savannah Guthrie shares the images online, urging anyone with information to contact authorities.

A man is detained during a traffic stop south of Tucson but is later released. He tells reporters he was delivering packages in the area.

The sheriff’s department confirms it searched a location in Rio Rico, south of Tucson, with the help of the FBI.

(With inputs from AP)