Tenergy battery company "saddened" by Boston blasts

Screen grab of Reuters video shows image the news agency says was included in an FBI bulletin given to Reuters by an unnamed federal official. The bulletin says the image is of evidence gathered at scene of Boston Marathon bombings on April 15, 2013 and shows what appears to be a piece of wire attached to a battery that could have been part of one of the two bombs used in the attack. Reuters video

The company that made the battery used in at least one of the Boston Marathon bombs expressed condolences for the victims of the attack.

FBI photos of post-blast fragments show a Tenergy battery was used in the apparently homemade weapon that ignited close to the finish line of the annual race.

In a press release, Tenergy said it had contacted the FBI and Boston Police and will assist in any way they can to find the person or people behind the twin blasts, which killed three and injured more than 170 spectators and runners.

"Everyone at Tenergy is deeply saddened by the recent events at the Boston Marathon. Our hearts and thoughts are with the victims and their families," the company said. "We were appalled to discover that one of our off-the-shelf products was used in such a horrific and senseless act of hate," the company said.

Authorities said Tuesday that the explosives were made from metal pressure cookers stuffed inside black vinyl bags. Photos, which were included in an FBI bulletin leaked to Reuters from a federal official, also revealed a Tenergy battery, pieces of wires, circuit board and nails -- which officials said were used to maximize casualties.

Tenergy said the battery in the photo appears to be a 1.25V 3000mAh Sub-C size Nickel Metal Hydrid, which "is commonly used by hobbyists for various toys including radio controlled cars, trucks, etc."

The product has been widely available on the retail market for several years and Tenergy has sold tens of thousands of that particular battery over just the past year, the company added. Each battery costs a few dollars.

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    Sara Dover is an associate news editor for CBSNews.com

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