Fifteen people were sent to the hospital after an explosion ripped through a ball bearings plant in Peterborough, New Hampshire.
Eric Bowman, spokesman for the Peterborough Fire Department, said that the windows on the plant's first floor all broke, but there was no fire, reports The Associated Press.
The cause of the explosion at the Ball Bearings Inc. is not yet known, but a hazardous-materials team was on the scene.
According to New York Daily News, two in the hospital were seriously hurt, but no one was in critical condition.
Due to the plant's work on aerospace parts, hospitals in the area are on alert for anyone who possibly came in contact with hazardous materials.
The AP notes that the plant employs about 700 people and about 450 are there during that time. Governor Maggie Hassan said that all the employees working on Monday have been found.
Peterborough is the town that inspired the Pulitzer Prize-winning play Our Town.