Three dead, 18 first responders quarantined after exposure to unknown substance at New Mexico home

Three people died and nearly 20 first responders were quarantined Wednesday after exposure to an unidentified substance at a New Mexico home, authorities said.

New Mexico State Police said officers responded around 11 a.m. to a residence in Mountainair, New Mexico, to assist the Torrance County Sheriff’s Office with what was initially believed to be a suspected overdose involving an unknown substance.

Authorities said four people were found unresponsive inside the residence. Three of them were pronounced dead...