MOUNTAINAIR, N.M. (AP) — Three people are dead and more than a dozen first responders had to be quarantined and assessed Wednesday for possible exposure to an unidentified substance after being called to a suspected drug overdose at a rural New Mexico home, authorities said.
New Mexico State Police said three of the four people who were found unresponsive inside the home east of Albuquerque died. The fourth was being treated at a hospital in Albuquerque.
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New Mexico State Police respond to home in Mountainair, N.M., where authorities say several people died Wednesday, May 20, 2026, and more than a dozen first responders were exposed to an unknown substance and later treated at a hospital. (AP Photo/Savannah Peters)
The University of New Mexico Hospital is seen on July 25, 2025, in Albuquerque, New Mexico. (AP Photo/Susan Montoya Bryan)
A New Mexico State Police vehicle blocks off a neighborhood in Mountainair, N.M., where authorities say several people died Wednesday, May 20, 2026, and more than a dozen first responders were exposed to an unknown substance and later treated at a hospital. (AP Photo/Savannah Peters)
FILE - A New Mexico State Police emblem is displayed on podium during a news conference, March 16, 2024, in Albuquerque, N.M. (Jon Austria/The Albuquerque Journal via AP, File)
During the response, authorities said, first responders were exposed to the substance and began experiencing symptoms including nausea and dizziness.
Officials at University of New Mexico Hospital confirmed that 23 patients who were exposed to an unknown substance were assessed and decontaminated after being transported to the hospital. Most of those were first responders who were showing no symptoms and were later discharged.
Medical teams continued to monitor three symptomatic patients Wednesday evening, according to the hospital.
Two first responders were listed in serious condition, said Officer Wilson Silver with New Mexico State Police.
Albuquerque Fire Rescue Hazmat teams were assisting at the scene in Mountainair, a rural community east of Albuquerque, in efforts to identify the substance involved.
“At this time, investigators believe the substance may be transmitted through contact and do not believe it to be airborne,” Silver said.
A police vehicle and yellow tape blocked a dirt road leading to the home.
While the investigation was ongoing, Mountainair Mayor Peter Nieto said in a social media post that indications were pointing toward drugs as a possible factor in the deaths at the home. He added that there was no threat to the public.
Residents, however, took to social media to voice their frustrations about drug use in the community and elsewhere.
The mayor said the town's law enforcement officers and first responders work every day to protect the community and respond to difficult situations.
“But the reality is that addiction and substance abuse are issues affecting communities all across our state and nation,” Nieto said. “There is no simple or immediate solution. Lasting change requires family support, accountability, education, and most importantly, individuals who are willing to accept help.”
Montoya Bryan reported from Albuquerque, New Mexico.
New Mexico State Police respond to home in Mountainair, N.M., where authorities say several people died Wednesday, May 20, 2026, and more than a dozen first responders were exposed to an unknown substance and later treated at a hospital. (AP Photo/Savannah Peters)
The University of New Mexico Hospital is seen on July 25, 2025, in Albuquerque, New Mexico. (AP Photo/Susan Montoya Bryan)
A New Mexico State Police vehicle blocks off a neighborhood in Mountainair, N.M., where authorities say several people died Wednesday, May 20, 2026, and more than a dozen first responders were exposed to an unknown substance and later treated at a hospital. (AP Photo/Savannah Peters)
FILE - A New Mexico State Police emblem is displayed on podium during a news conference, March 16, 2024, in Albuquerque, N.M. (Jon Austria/The Albuquerque Journal via AP, File)
