An explosion at a ball bearing factory in New Hampshire injured 15 people, at least two seriously, authorities said Monday.
A spokeswoman for Monadnock Community Hospital said 15 patients had been seen there and two of them were airlifted to other hospitals. The others were treated and released, she told NBC News.
First responders were still trying early Tuesday to determine the cause of the explosion, which could be felt a quarter of a mile away, the Associated Press reported. The report says none of the injuries were deemed fatal.
Plant machinery operator Paul Clark told the AP he was outside in the parking lot when he heard the explosion.
“I was in my car backing up when I felt a rumble and heard a bang,” he said. “I looked up and the snow on the roof of the building was flying in the wind.”
Aerial video showed Blown out windows on a long section of the sprawling building housing New Hampshire Ball Bearings in Peterborough. The police chief said the explosion happened on the first floor of the factory, NBC station WMUR reported.
“It shook our building, shook the glass of our showroom,” Steve Bourgeois of Peterborough Collision told WMUR. He said the store was 200-300 feet from the factory.
the the company states on its website that it manufactures ball bearings for the aerospace, defense, medical and technology industries.
Peterborough is about 70 miles northwest of Boston.