A "mass casualty incident (MCI) has been declared in Salem Massachusetts after a chemical leak possibly involving Chlorine.
Twelve ambulances have been requested for at least twenty people found unconscious at the scene located at #1Technology Way in that town.
Developing . . . . check back for updates
Over 100 exposed. Decontamination tent being set up at Salem Hospital. "Thermal Circuits."
First Responder crews have been ordered to back-off and remain outside. Unknown number of people down.