A third person has died from the bombing , Boston Police Chief Ed Davis says . Mike Baingon , who works at the Atlantic Fish Company in Boston , said an explosion took place in front of the restaurant and that he was right by the front door at the time . An elementary - old boy was one of those killed . The explosions were small , with no initial sign of high - grade explosive material , an official tells CNN . Davis says those guilty ` ` will face the full weight of justice ''
A third person has died from the bombing , Boston Police Chief Ed Davis says . An elementary - old boy was one of those killed . The explosions were small , with no initial sign of high - grade explosive material , an official tells CNN . Davis says those guilty ` ` will face the full weight of justice ''