PETERBOROUGH, NH (WHDH) - At least 15 people were hurt Monday in an explosion at a ball-bearing factory in southern New Hampshire.
Ambulances and medical helicopters were sent to the New Hampshire ball bearings plant outside Peterborough.
A company spokesperson says none of the injuries appear to be life threatening.
The factory makes bearing assemblies for aircraft, medical and high-tech industries.
Investigators are looking into the cause of the explosion
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