A hazardous-substance incident in New Mexico on Wednesday has resulted in three deaths and sent a significant number of first responders for medical care.
Close to 20 emergency personnel were quarantined after responding to an event in a rural area of the state. Authorities were dispatched to Mountainair following reports of a possible overdose involving an unidentified substance.
New Mexico State Police said troopers arrived at the residence shortly after 11am, after Torrance County Sheriff’s Office requested assistance concerning a suspected residential overdose tied to an unknown material.
Inside, officers located four people who were unresponsive. Three were declared dead at the scene, according to a police statement. Although investigators have not yet confirmed what the substance was, officials say its effects extended beyond the home.
Because multiple fatalities were reported at one address, numerous responders attended the scene and were potentially exposed. Police indicated that 18 emergency workers may have been affected by the unidentified chemical.
Several responders later reported symptoms including nausea and dizziness after being at the location in Mountainair.
The fourth individual found in the home, along with a number of first responders, was transported to the University of New Mexico Hospital. Officials said the patients were taken there for treatment as well as quarantine and evaluation.
Local police said two of the affected first responders are believed to be in serious condition.
Mountainair firefighter Antoinette Alguire told ABC News she administered CPR to a woman outside the home where the toxic substance was discovered. She then noticed paramedics and other responders beginning to fall ill.
Alguire said she saw colleagues coughing, vomiting, and experiencing dizziness, underscoring the risks emergency workers increasingly face.
“I guess we’re just going to have to start wearing hazmat suits into these calls and wearing oxygen,” she said. “It’s getting to that point where we just have to live in fear, even saving lives.”
As investigators work to determine what chemical triggered illnesses in more than a dozen responders, New Mexico State Police Officer Wilson Silver provided an update on what is currently understood.
🇺🇸 A hazmat incident in Mountainair, New Mexico left 3 people dead and hospitalized 18 first responders, including 2 in serious condition, after exposure to an unidentified substance authorities say may spread through contact.
First responders were called to a home for a… https://t.co/9be9hQqemh pic.twitter.com/RehKmd3VA8
— The Globe & News (@TheGlobeNewt) May 21, 2026
“At this time, investigators believe the substance may be transmitted through contact and do not believe it to be airborne,” he said, adding that there were indications that the incident could be drug-related.
Mountainair Mayor Peter Nieto also addressed residents late Wednesday, noting the town’s chief paramedic was being kept overnight for treatment. The statement reads: “There are still many unknowns at this time.
“We remain committed to being as transparent as possible, and as soon as we receive confirmed information, we will continue to share it with the public so our community stays informed.”
In response to community concern about the toll of drug abuse locally, Nieto said: “But the reality is that addiction and substance abuse are issues affecting communities all across our state and nation.
“There is no simple or immediate solution. Lasting change requires family support, accountability, education, and most importantly, individuals who are willing to accept help.”