The death toll in the Boston Marathon bombings has increased to three people, according to the Boston Police commissioner.

Among the dead was an 8-year-old boy, law enforcement sources told ABC News.

"This cowardly act will not be taken within stride," Boston Police Commissioner Ed Davis said 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, police said.

The site

http://www.nytimes.com/interactive/2013/04/15/us/site-of-the-boston-marathon-explosion.html?_r=0

Kevin Cullen of the Globe really hit it...Unimaginable but ....makes us Stronger

Boston's TV stations were on the story full time soon after of  the  detonations of two devices during yesterday's Boston Marathon. They went  wall-to-wall with within minutes of the explosions and, after overnight  breaks, started up again early this morning. Drawing on video from the  affiliates and others, notably Boston.com, the  networks quickly got on  board covering their explosions for the rest of  the country and  contributing supplemental reports, including President  Obama's  statements Monday afternoon.