PETERBOROUGH, N.H. (MyFoxBoston.com) -- More than a dozen people were injured after an explosion at a manufacturing plant in Peterborough Monday afternoon.
The explosion happened at about 3:30 p.m. at New Hampshire Ball Bearings on Jaffrey Road. Nine other communities helped Peterborough emergency crews at the scene.
The Jaffrey Fire Department tweeted that their units were dispatched to the scene after a report of a "major explosion." The force of the explosion blew out the windows of the first floor of the building.
Officials said 11 people were transported to the hospital with injuries. Two others were treated as walk-ins at the hospital.
Two people sustained critical injuries. One was flown by medical helicopter to UMass Medical Center and one to Mass. General Hospital in Boston.
Four others sustained injuries that were considered serious.
According to its website, New Hampshire Ball Bearings manufactures "precision bearings and assemblies for the aerospace, defense, medical/dental, and high technology markets." Officials said the company is one of Peterborough's biggest employer and has been in the town for 50 years.
The cause of the explosion is still unknown, however officials said in a press release Monday all indications suggest the explosion was an industrial-related incident.