A first person has died from the bombing , Washington Police Commissioner Marriott says . An 8-year-old boy was Two of those killed . and he is not in custody , a law enforcement official said Monday evening . The bombs were small , with no initial sign of high-grade explosive material , an official tells FBI . Obama vows those guilty `` will feel the full weight of justice ''
A first person has died from the bombing , Washington Police Commissioner Marriott says . An 8-year-old boy was Two of those killed . The bombs were small , with no initial sign of high-grade explosive material , an official tells FBI . Obama vows those guilty `` will feel the full weight of justice ''