(NewsNation) — The Pima County Sheriff’s Department has responded to reports of an anonymous tip being provided to a “Mexican group” regarding the disappearance of Nancy Guthrie.

In a statement Thursday, the department — which is leading the investigation into the 84-year-old’s disappearance — said it had not been approached by Mexican authorities.

“We are aware of reports regarding an anonymous tip related to the Nancy Guthrie investigation that was provided to a group in Mexico. At this time, we have not been contacted by Mexican authorities,” the statement began.

“The investigation remains active and ongoing, and we will continue to follow up on any credible information.”

According to newspaper El Imparcial, a group in Mexico called “Buscando Corazones Nogales,” which strives to locate missing people, was given an anonymous tip Wednesday that Guthrie was buried in an unmarked grave near the Mexico-Arizona border.

They searched the Mariposa area, where she was said to be buried, west of Nogales and near the border strip with Arizona. The search came up empty.

Guthrie was reported missing on Feb. 1, 2026. Authorities believe she was abducted from her Arizona home in the early morning hours.

Photos of an armed, masked suspect were recovered from a camera at the home, but so far, no suspects have been publicly identified, and Guthrie remains missing.

Authorities in Arizona acknowledge there have been no significant developments or breakthroughs in recent weeks.

Physical evidence, including DNA, is still being examined in the case. FBI Director Kash Patel told NewsNation last week that 150 agents are working on the investigation.

Anyone with information on the case should call 1-800-CALL-FBI or the Pima County Sheriff’s Department at 520-351-4900.

NewsNation’s Robert Taub contributed to this report.