Three people died and nearly 20 first responders were quarantined after being exposed to an unidentified substance at a Mountainair, New Mexico, home.

Three people are dead and more than a dozen first responders were quarantined and being treated Wednesday for exposure to an unidentified substance after being called to a suspected drug overdose at a

New Mexico authorities said three people are dead and more than a dozen first responders were being treated Wednesday for exposure to an unidentified substance after being called to a home east of Albuquerque for a suspected drug overdose. New Mexico State Police say three of the four people who…