BOSTON, MA (ABCNews.com) -- The death toll in the Boston Marathon bombings has increased to three people, according to the Boston Police commissioner.
"This cowardly act will not be taken within stride," Boston Police Commissioner Ed Davis told reporters this evening. "We will turn every rock over to find the people who are responsible for this."
At least 133 people were injured, including several children with severe trauma, when bombs exploded almost simultaneously near the marathon finish line. Some of the injuries have been described as amputations and severe burns.
The FBI said it has taken charge of the investigation and has no suspect in custody.