BOSTON – The search for forensic evidence turned up pieces of black nylon that could have been from a bag or backpack at both blast sites, DesLauriers said. Law enforcement sifting through the damage also recovered pieces of BBs and nails, possibly from a pressure-cooker explosive device used to maximize injuries.
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No group or individual has claimed responsibility for the attack, which killed at least three people and wounded more than 180 others.
“Someone knows who did this,” DesLauriers said. “The person who did this was someone’s friend, neighbor or co-worker.” (more…)









