Nancy Guthrie's family offers $1m reward to bring home missing mother

US news anchor Savannah Guthrie has announced her family is offering a $1m reward for information leading to the return of her mother on day 24 of the search for the 84-year-old.

Fighting back tears, the NBC host said in an Instagram video that they are "aching" for Nancy Guthrie, who is suspected to have been abducted from her home in Tucson, Arizona.

"We still believe in a miracle, we still believe that she can come home - hope against hope," said the presenter.

"We also know that she may be lost, she may already be gone, she may have already gone home to the Lord that she loves."

In the video released on Tuesday morning, Savannah Guthrie said her family would also donate $500,000 to the National Center for Missing and Exploited Children.

She continued: "Please, if you hear this message, if you've been waiting and you haven't been sure, let this be your sign to please come forward.

"Tell what you know, and help us bring our beloved mom home, so that we can either celebrate a glorious, miraculous homecoming or celebrate the beautiful, brave and courageous and noble life that she has lived."

In a post on X, the FBI's Phoenix office said anyone with "firsthand knowledge" of Guthrie's whereabouts should contact the FBI tip line at 1-800-CALL-FBI.

Until now, the reward has been $200,000 - $100,000 offered by the FBI and another $100,000 through Tucson Crime Stoppers.

Guthrie was reported missing around midday on 1 February after she did not show up for church services.

The Pima County Sheriff's Office has said they believe she was "taken from the home against her will, possibly in the middle of the night and that includes possible kidnapping or abduction".

The family has made several public pleas for her safe return, and asked for proof that she is alive. Nancy Guthrie has difficulty walking, has a pacemaker and needs daily medication for a heart condition, authorities have said.

Investigators have released images of the prime suspect - a man captured on Nancy Guthrie's Nest doorbell camera.

This same suspect appears to have been at Nancy Guthrie's front door on another occasion before she went missing, a law enforcement source told the BBC's US partner CBS.

Purported ransom notes demanding about $6m in cryptocurrency have been sent to media outlets, including one note whose deadline expired on 9 February. At least one note was a fake, allegedly sent by a 42-year-old California man, who has been charged.

Massive interest in the case has turned Tuscon - a relatively quiet city popular with retirees - into a global media hub. Dozens of curious observers and amateur sleuths have descended on the area.

Detectives have received close to 40,000 tips from the public.

DNA evidence was recovered from a glove - similar to one worn by the suspect recorded on doorbell camera footage - that was found not far from her home, but it yielded no matches in a FBI database, authorities said.

Investigators have ruled out all members of the Guthrie family as possible suspects, with Pima County Sheriff Chris Nanos previously saying that to "suggest otherwise is not only wrong, it is cruel".