The search for missing Arizona grandmother Nancy Guthrie has taken another turn after an anonymous tip led volunteer searchers to a remote area near the U.S.-Mexico border in northern Mexico.

The operation, carried out by a volunteer search organization in the Mexican state of Sonora, followed claims that Guthrie’s remains had been buried in an unmarked grave near the Mariposa area, northwest of Nogales. After an extensive search, however, investigators found no evidence linking the site to the missing 84-year-old.

While the anonymous tip did not produce any confirmed leads, authorities and volunteer groups say the investigation into Guthrie’s disappearance remains active.

TL;DR

• Volunteer searchers in Sonora, Mexico, investigated an anonymous tip about Nancy Guthrie.
• The tip claimed her remains were buried in an unmarked grave near Mariposa, northwest of Nogales.
• No remains connected to Guthrie were found during the search.
• Guthrie disappeared from her Tucson-area home on February 1, 2026.
• Authorities continue to investigate the case as a suspected abduction.
• No arrests or confirmed suspects have been announced.

What prompted the new search?

The latest search began after Buscando Corazones Nogales, a volunteer organization that helps locate missing persons in northern Mexico, received an anonymous phone call.

According to the group’s leader, Ramona Guadalupe Ayala Ortiz, the caller claimed Nancy Guthrie’s remains had been buried near a stream in the Mariposa area close to the U.S.-Mexico border.

Because the location had previously yielded multiple clandestine graves, volunteers treated the information seriously and organized a coordinated search.

Where did the search take place?

Search teams focused on the Mariposa area in Sonora, northwest of Nogales.

The region has previously been the site of numerous discoveries of unmarked graves, making it a priority location for organizations searching for missing persons.

The operation involved:

• Buscando Corazones Nogales volunteers.
• The Sonora State Commission for the Search of Missing Persons.
• Municipal and state security personnel providing protection during the search.

Organizers said the anonymous tip remained unverified throughout the operation.

What did searchers find?

Despite an extensive search of the area, investigators did not discover any remains linked to Nancy Guthrie.

According to Ayala Ortiz, volunteers examined terrain where previous recovery efforts had uncovered numerous burial sites, but this latest operation produced no evidence connecting the location to the missing Arizona woman.

Search organizers emphasized that the unsuccessful search does not necessarily invalidate the anonymous tip and said additional searches could be conducted if new information emerges.

Who is Nancy Guthrie?

Nancy Guthrie, 84, disappeared from her home in the Catalina Foothills area near Tucson, Arizona, during the early morning hours of February 1, 2026.

She is the mother of NBC News anchor Savannah Guthrie.

Authorities have described the investigation as a suspected abduction and continue to seek information about her disappearance.

More than four months after she went missing, investigators have not announced any arrests or publicly identified suspects.

Why was the Mexican search considered significant?

Although there is no confirmed evidence placing Guthrie in Mexico, volunteer organizations routinely investigate anonymous tips because they can occasionally lead to the discovery of missing persons.

The Mariposa area was considered particularly important because search groups had previously recovered multiple unmarked graves there during earlier operations.

Even though this search did not locate Guthrie, officials say every credible lead must be investigated until the case is resolved.

What happens next?

Law enforcement agencies in the United States continue to investigate Nancy Guthrie’s disappearance.

Volunteer organizations in Mexico also indicated they may revisit the area or examine additional locations if further information becomes available.

Authorities continue to encourage anyone with information about Guthrie’s whereabouts or disappearance to contact investigators.

For now, the anonymous tip remains unverified, and Nancy Guthrie’s disappearance remains an active, unsolved investigation.