A volunteer group in Mexico has renewed its search for Nancy Guthrie, the mother of US television host Savannah Guthrie, after previous attempts in a remote northern region yielded no results. The organization, Buscando Corazones Nogales, based in Sonora, initiated its investigation following an anonymous tip received on May 10, which suggested that a body resembling Guthrie's description might be buried in a shallow grave near Nogales, approximately 70 miles (113 km) from her residence in Tucson, Arizona.

The group conducted searches on May 16 and returned later after the informant provided information about another nearby site. Unfortunately, neither search uncovered any evidence related to Guthrie. A subsequent search on Wednesday also failed to yield results. Although volunteers did find 25 unmarked graves in the area, none were linked to the 84-year-old woman. Despite these setbacks, the organization plans to continue its efforts and will investigate two more locations in the vicinity. Volunteers described the search area as extensive and challenging to navigate.

Authorities in Arizona have been informed of the search efforts through media coverage. Pima County Sheriff Chris Nanos stated that local law enforcement and the FBI have not received direct communication from Mexican officials regarding the anonymous tip. "We are aware of reports concerning an anonymous tip related to the Nancy Guthrie case that was given to a group in Mexico. At this moment, we have not been contacted by Mexican authorities," Nanos remarked. He emphasized that the investigation remains active and that they will pursue any credible leads.

Nancy Guthrie was last seen on January 31, after family members dropped her off at her Tucson home following a dinner. She has a pacemaker and requires daily medication for a heart condition. The investigation into her disappearance has been ongoing for over four months, with Wednesday marking the 136th day since she was last seen. Investigators have previously released images of an armed and masked individual captured on surveillance outside Guthrie's home around the time she went missing. No suspects have been publicly identified, and her current whereabouts remain unknown. Multiple rewards are being offered for information related to the case, including $100,000 from the FBI, $102,500 from an Arizona crime reporting organization, and $1 million from the Guthrie family for information that aids in resolving the investigation.