3 dead, first responders quarantined for exposure to unknown substance in New Mexico

Mountainair Mayor Peter Nieto said that at least three occupants have died in a possible home hazmat situation that led to several EMS hospitalizations.

Last Updated : Thursday, 21 May 2026
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Washington: At least three people are dead on Wednesday and more than a dozen first responders were quarantined, currently being treated, for possible exposure to an unidentified substance after being called to a suspected drug overdose at a rural New Mexico home, authorities said.

What did the mayor say?

Mountainair Mayor Peter Nieto said that at least three occupants have died in a possible home hazmat situation that led to several EMS hospitalizations.

The mayor further said that the residence response led to the deaths and others needing medical treatment.

How many people were affected by the substance?

About 18 first responders and an occupant was transported to the University of New Mexico Hospital, where they are being quarantined and evaluated further.

Three of the four EMT workers from Mountainair have been released from the hospital. Mayor Nieto said that Mountainair EMS Chief Josh Lewis will remain hospitalized overnight.

Nurses at UNMH came into contact and have experienced symptoms as well. There is no local public danger deemed for the situation, according to Nieto.

What is the reason of this situation?

The cause of the hazmat situation has not been released. However, Mountainair Mayor Peter Nieto said that the early information points to narcotics being a potential factor.

Mayor Peter Nieto said in a social media post that all indications were pointing toward narcotics as a possible factor. "The reality is that addiction and substance abuse are issues affecting communities all across our state and nation," he said.