By Jon Stroshine | Echo
As the amount of human carnage has risen-three dead and well over 100 injured, by most estimates-investigators have been left grasping for clues as to who could be behind the blasts.
Boston.com reported this afternoon that authorities had found a circuit board near where the bombs went off which they believe was used to set off the charges.
They also were able to determine the components of the bomb, which included shrapnel of various kinds, according to the article.
The investigation is still ongoing, and police are unsure of the cause of the explosions.
According to a whitehouse.gov blog, President Obama said yesterday that "...people shouldn't jump to conclusions before we have all the facts. But make no mistake -- we will get to the bottom of this. And we will find out who did this; we'll find out why they did this. Any responsible individuals, any responsible groups will feel the full weight of justice."
Martin Richard, 8, of Boston died in the blasts, as did Krystle Campbell of Arlington, Mass. Boston.com reported that the third victim was a Boston University graduate student. Seventeen of the injured remain in critical condition.
Yesterday's bombing occurred just before 3 p.m. at the annual Boston Marathon in Boston. The annual race occurrs on Patriot's Day, the third Monday in April and a holiday in Massachussetts.
A fire which broke out at the nearby John F. Kennedy Library around the same time is also being investigated. It is unclear what started the fire and whether it has any connection to the tragedy at the marathon.