US news anchor Savannah Guthrie has issued a new plea for help as the reported deadline for a ransom payment for her mother's safe return loomed.


We are at an hour of desperation, and we need your help, she says in the video posted on Instagram on Monday afternoon.


Nancy Guthrie disappeared in the middle of night from her home in Tucson, Arizona, and was last seen on January 31. Authorities believe she was taken against her will. The FBI is offering a $50,000 (£36,000) reward for information.


The family had earlier indicated that they would be willing to pay for her safe return. A previous alleged deadline for ransom, which is meant to be paid in Bitcoin, passed on February 5.


Nancy Guthrie was discovered missing when she did not attend a Sunday church service on February 1, prompting concern from other members.


The family has released three previous videos expressing their willingness to negotiate with the potential kidnapper and asking for proof that their mother is alive.


I just want to share a few thoughts as we enter another week of this nightmare, Guthrie says in the latest video. She was taken, and we don't know where. And we need your help. Savannah thanked the public for their prayers, saying her mother feels them even in this darkest place. She emphasized the need for anyone, even those far from Tucson, to report anything suspicious that could offer clues about her mother.


In the face of uncertainty, the sheriff's office noted that there were no suspects or vehicles identified in the case as of Sunday. The FBI is investigating multiple ransom notes sent to local media outlets, with a strict timeline for payment.