Three dead, dozen quarantined after exposure to unknown substance during drug-related emergency

First responders in rural New Mexico received a call for a suspected drug overdose in a small community east of Albuquerque. They found four people unresponsive at the Montainair home, three of whom died. 

More than a dozen first responders started to experience nausea and dizziness after being exposed to an unidentified substance during the call. They had to be quarantined and decontaminated, the Associated Press reported. 

A volunteer firefighter was performing CPR on a woman outside the home and said she saw EMTs and firefighters coughing, vomiting and becoming dizzy at a heliport. 

Mountainair Mayor Peter Nieto told the Associated Press that the health issues first responders experienced weren't related to natural gas or carbon monoxide.