'Do the right thing': 'Today' host Savannah Guthrie shares new plea for mother's kidnappers

As the search for her missing mother nears the six-month mark, “Today” show host Savannah Guthrie is making a renewed public plea for help.

Guthrie posted a new video on Instagram on Monday, saying her family will never stop searching for her 84-year-old mother, Nancy Guthrie.

"I'm coming on today with a very specific message," Guthrie said. "It has been months since our mom was taken from us. Our family is in agony. We are in a nightmare that will not end. Nothing about our situation has changed."

Nancy Guthrie disappeared from her home in Tucson on February 1. Investigators believe she was taken against her will, but they have not identified a suspect or suspects.

In the video, Guthrie asks anyone with information to come forward, saying her family remains determined to find answers.

"We have done our part, and we will never stop looking for her," Guthrie said. "We will always ache for her and feel that hole in our hearts. The world can be a cruel and unforgiving place, and I know that you have tried to do things the right way. So I'm asking you, begging you, to do the right thing now. Make the right choice. Help us find her. Tell us where to look for her. I truly believe it is never too late to do the right thing. Help us bring this situation to an end. "

Savannah Guthrie and her siblings continue to offer a $1 million reward for information leading to their mother’s whereabouts.

"For all of us, no matter where we've been or what we've done, I believe there is always a way home," Guthrie said. "Please make the right choice."

The investigation remains active. Anyone with information is urged to contact law enforcement.