13 Injured in NH Industrial Plant Explosion

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Two explosions rocked a ball bearing industrial plant in New Hampshire sending 13 people to hospitals.  Two had critical injuries.

Petersborough Fire and Rescue said that authorities are investigating the cause of the explosion.  "It is not believed to be an act of terrorism," Fire & Rescue said in a statement.

The explosions occurred in an area of the plant where chemicals are mixed.  It appears to be an "industrial-related" accident.  

"We have no new information yet, but we are very concerned about the reports that two of our employees are critically injured," said Kathy Gerrity, company spokewoman.