Nancy Guthrie was dropped off at home on the night of 31 January. She walked through her front door in Tucson, Arizona, and was not seen again. When she failed to appear at a friend's house the following morning for a livestreamed church service, her family called the police. That was 24 days ago.

On Tuesday, 24 February, her daughter Savannah Guthrie, co-anchor of NBC's Today show, posted a video to Instagram announcing that the family is offering up to $1 million (£790,000) for any information leading to Nancy's recovery. With rewards already on the table from the FBI and Tucson Crime Stoppers, the combined total now stands at more than $1.2 million (£950,000),ABC News reported.

'It is day 24 since our mom was taken in the dark of night from her bed,' atearful Savannah Guthriesaid in the four-minute video. 'Every hour and minute and second and every long night has been agony since then - of worrying for her, fearing for her, aching for her, and most of all just missing her.'

The 44-year-old broadcaster acknowledged her mother may not be alive. 'We also know that she may be lost. She may already be gone,' she said. 'But we need to know where she is. We need her to come home.'

A post shared by Savannah Guthrie (@savannahguthrie)

The family of missing Tucson woman Nancy Guthrie is offering a private $1 million reward for credible information that directly leads to her return.If you have firsthand knowledge of Nancy’s whereabouts or any information about where she may be located, please contact the FBI…pic.twitter.com/FgeWFDizcJ

ThePima County Sheriff's Departmenthas said it believes Nancy Guthrie, 84, was taken from her home against her will, most likely while she was asleep. Her pacemaker disconnected from her mobile phone at around 2:30 a.m. on 1 February, a detail authorities say helped them identify the approximate window of the suspected abduction.

On 10 February, FBI Director Kash Patel published photographs and footage captured by a Nest doorbell camera at the property. The images show a masked man approaching the front door. He is described by the FBI as having an average build and standing approximately 5-foot-9 to 5-foot-10, wearing gloves and carrying a black 25-litre Ozark Trail hiker's backpack. No person of interest has been publicly named, as perCNN.

The timing of some of those images has since been called into question. Two law enforcement sources told NBC News that not all photographs of the masked man were taken on the morning of the disappearance. Pima County Sheriff Chris Nanos said investigators have no evidence confirming an earlier date and that the matter remains under active inquiry.

DNA recovered from a glove found roughly two miles from the property was submitted to the CODIS national database and returned no match. Biological evidence collected from inside the home is still being analysed. Investigators have received more than 20,000 tips. Savannah Guthrie and her siblings, as well as their respective spouses, have all been cleared as suspects,the Pima County Sheriff's Department confirmed.

Source: International Business Times UK