An explosion at a Massachusetts manufacturing facility has killed one worker and injured another.
Officials say the man was an employee at Advanced Vacuum Systems in Ayer, about 40 miles northwest of Boston.
The Middlesex District Attorney’s office says its investigation suggests the explosion was the result of a pressure vessel malfunction.
The workers have not been identified.
Two firefighters also sustained minor injuries.
The investigation is ongoing. The federal Occupational Safety and Health Administration is conducting a separate investigation.
Advanced Vacuum Systems manufactures custom vacuum and pressure furnaces.
Topics Massachusetts
Was this article valuable?
Here are more articles you may enjoy.
Good Times for US P/C Insurers May Not Last; Auto Challenges Ahead 
MAPFRE Accuses AAA of Violating Long-Time Exclusive Marketing Agreement 
Nearly Half of 100 Largest P/C Insurers Destroy Value: ACORD 
Florida Lawmakers Ready for Another Shot at Litigation Funding Limits 
