'Illicit' version of fentanyl linked to deadly New Mexico incident that sickened first responders

Authorities on Friday identified the mystery substance that hospitalized more than a dozen first responders after they responded to a New Mexico home where three people died in a suspected overdose incident.

Officials said first responders were exposed to fentanyl after arriving at a home in Mountainair, New Mexico, where four people were found unresponsive.

Two victims were pronounced dead at the scene, while a third later died at the University of New Mexico Hospital. A fourth person survived.