The suspects threw explosives from their car as they sought to elude police and left a “low-grade” bomb inside the vehicle they had carjacked at gunpoint, according to the complaint. Authorities described a street strewn with “IEDs” after a shootout with the suspects in the early morning hours on Friday. They said they later recovered “a large pyrotechnic” from the surviving brother’s dorm room.The collection of explosives catalogued in the federal charges suggest that the bombers had assembled far more firepower than they employed in the attacks that killed three and wounded more than 200 along the marathon route on April 15.
Federal, state and local officials have offered conflicting statements on whether the suspects, Tamerlan, 26, and Dzhokhar Tsarnaev, 19, intended to carry out follow-up attacks. The complaint includes no information to suggest that authorities have uncovered evidence that the bombers were eyeing additional targets.