“TODAY” co-anchor Savannah Guthrie on Tuesday announced her family is offering a reward of up to $1 million for the recovery of her 84-year-old mother, Nancy Guthrie, who disappeared more than three weeks ago. “Someone knows how to find our mom and bring her home,” Savannah Guthrie wrote in a caption accompanying a video posted on Instagram just before 9 a.m. Tuesday. In the video, a visibly emotional Savannah Guthrie urged the public to keep her mother in their thoughts. “Please keep praying without ceasing,” she said. “We still believe. We still believe in a miracle. We still believe that she can come home, hope against hope, as my sister says. We are blowing on the embers of hope.” “We also know that she may be lost,” she added. “She may already be gone.” The Guthrie family plans to donate $500,000 to the National Center for Missing and Exploited Children. “We know there are millions of families that have suffered with this kind of uncertainty,” Savannah Guthrie said. Michelle DeLaune, the chief executive of the National Center for Missing Exploited Children, confirmed the Guthrie family’s donation in a blog post. “Their donation is rooted in a simple but powerful belief: when a family is in crisis, they deserve someone to stand with them,” DeLaune said. The Guthrie family was prepared to offer a cash reward from the beginning of the investigation, but they were advised that doing so might overwhelm the infrastructure set up to field leads, according to a source close to the family. The family decided to offer the reward after careful consultation and coordination with law enforcement, the source said. The reward does not hinge on an arrest or prosecution, only Guthrie’s recovery, the source said, and the $1 million can be split if there is more than one valid claim. The Pima County Sheriff’s Office said early on that investigators believe Guthrie was “taken from the home against her will, possibly in the middle of the night and that includes possible kidnapping or abduction.” Authorities have not identified a suspect in the case, though the FBI released doorbell camera images and videos of an armed and masked man outside Guthrie’s house on the morning she disappeared. (Two law enforcement sources said Monday that one of the images was captured earlier.) All members of the Guthrie family have been cleared as possible suspects, Pima County Sheriff Chris Nanos previously said, adding that to “suggest otherwise is not only wrong, it is cruel.” Arizona Feb 23 What could come next in the investigation into Nancy Guthrie's disappearance Arizona Feb 22 Genetic genealogy brings promise and challenges to the Nancy Guthrie case Crime and Courts Feb 20 Plea from 911 official in Nancy Guthrie disappearance: Don't call with thoughts and opinions “The Guthrie family are victims, plain and simple,” Nanos added. Savannah Guthrie and her siblings have posted a series of Instagram videos since their mother went missing. In some of the videos, Savannah Guthrie made direct appeals to her mother’s possible captor. The FBI is offering a $100,000 reward for any information that leads to Guthrie or to an arrest, and an additional $102,500 reward is being offered through Tucson Crime Stoppers, known locally as 88-CRIME. In recent days, supporters of the Guthrie family have left flowers and handmade posters outside her home. In one sign seen by NBC News early Tuesday, an unidentified person directly addressed Guthrie’s possible kidnapper. “Unintentional things happen, and we get that,” one part of the sign said. “Life is made up of choices. Please make the right one now.” This story uses functionality that may not work in our app. Click here to open the story in your web browser. ...read more read less