ALBUQUERQUE (AP) — A major hospital network in New Mexico raced to fix a cybersecurity issue on Monday that forced it to send ambulances to other hospitals and left the state without an emergency department capable of treating the most serious injuries.

The University of New Mexico Health System told people not to show up at its main hospital in Albuquerque and canceled appointments at its more than 30 clinics. It said it was working to resolve the issue, the extent and nature of which was not immediately clear.

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The hospital network conducts about 900,000 outpatient visits and receives 100,000 emergency room visits each year, according to its website. It operates the state’s only Level 1 trauma center.

A cybersecurity issue forces a major New Mexico hospital to divert patients and close clinics
FILE - The University of New Mexico Hospital is seen on July 25, 2025, in Albuquerque, N.M. (AP Photo/Susan Montoya Bryan, File)

Presbyterian Healthcare Services and Lovelace Health System, two other major healthcare providers in New Mexico, said they were coordinating with the UNM Health System, including taking additional patients.

The UNM Health System said in a statement that its hospitals and clinics began resuming operations in phases later in the day.

Multiple UNM Health System employees said they heard messages across their computers while working late Monday morning that claimed to have stolen student and employee data and patient information.

A cybersecurity issue forces a major New Mexico hospital to divert patients and close clinics
This photo taken with a smartphone shows the University of New Mexico Health System on Monday, Oct. 26, 2026, in Albuquerque, N.M. (AP Photo/Christopher Keller)

A spokesperson for the health system wouldn't comment, saying that the incident remains an active law enforcement investigation. FBI spokesperson Margot Cravens in Albuquerque said the agency was “assisting our partner” but declined further comment.

The Associated Press left emails and phone messages seeking comment from the Bernalillo County Sheriff’s Office and the Albuquerque Police Department.

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The incident comes amid growing concern about the security of digital systems that underpin essential services, from banking to medical care.

A cybersecurity issue forces a major New Mexico hospital to divert patients and close clinics
In this photo taken with a smartphone, a sign at the main entrance of the UNM Sandoval Regional Medical Center in Rio Rancho, N.M., warns visitors that clinics are closed Monday, Oct. 26, 2026. (AP Photo/Susan Montoya Bryan)

Incidents affecting hospitals, including demands for ransom, have been going on for a decade, said Josephine Wolff, a professor of cybersecurity policy at Tufts University.

Breaching a system to play a message on computers is pretty unusual, Wolff said. Monday's incident, she said, shows "how much work we still have to do to get better at defending ourselves.”

On Monday afternoon, at the main entrance to its Albuquerque hospital, employees in turquoise staff shirts sat on chairs that blocked the waiting room and told patients their appointments might be canceled.

A cybersecurity issue forces a major New Mexico hospital to divert patients and close clinics
In this photo taken with a smartphone, a sign directs visitors at the UNM Sandoval Regional Medical Center in Rio Rancho, N.M., on Monday, Oct. 26, 2026. (AP Photo/Susan Montoya Bryan)

At a medical center in the Albuquerque suburb of Rio Rancho, two security guards at the entrance told patients arriving for appointments to reschedule.

UNM's Health Sciences Center, the state's largest academic medical center, canceled classes Monday and Tuesday. Employees in its hospital and medical group were expected back at work Tuesday.

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Yu reported from Phoenix. Associated Press writer Susan Montoya Bryan contributed from Rio Rancho, New Mexico.

 

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