Four firefighters were transported to the hospital after responding to a hazmat situation on Ballard Road in Lawrence early Sunday morning.
One person has died and 11 others were rushed to a hospital after an incident involving hazardous materials inside a Plymouth school.
Police are investigating three different incidents involving greeting cards with an unidentified white powder inside mailed to businesses in the Greater Lawrence area.
Hazmat crews were on scene at a house in Brighton Saturday morning.
A gas leak forced an evacuation at a lab on the campus of MIT on Thursday.
A hazardous materials team responded to a brief incident at a state prison in Gardner.
Three workers were taken to the hospital on Tuesday after possibly being exposed to a hazardous chemical.
The state Department Of Transportation has decided that trucks carrying hazardous materials, including gasoline and heating oil, cannot travel through Boston between 6 a.m and 8 p.m.
Hazardous materials crews responded to Nashoba Regional High School in Bolton on Sunday.
Police say they found a man in a car on Maguire Road who said he ingested liquid cyanide.