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May 21st, 2014
10:26 PM ET

Prosecutors: Christmas lights used in Boston marathon bombs

(CNN) - The accused Boston Marathon bombers used Christmas lights and model-car parts to make the explosives, prosecutors said in court documents obtained by CNN Wednesday.

"The Marathon bombs were constructed using improvised fuses made from Christmas lights and improvised, remote-control detonators fashioned from model car parts," federal prosecutors said in a motion filed Wednesday. "These relatively sophisticated devices would have been difficult for the Tsarnaevs to fabricate successfully without training or assistance from others."

To obtain explosive fuel for the pressure cooker bombs, the filing says, brothers Dzhokhar and Tamerlan Tsarnaev "appeared to have crushed and emptied hundreds of individual fireworks containing black powder."

Authorities say Tamerlan and Dzhokhar Tsarnaev, 20, planted bombs at the finish line of the 2013 race. Tamerlan Tsarnaev was killed during the manhunt that paralyzed Boston. Dzhokhar Tsarnaev has pleaded not guilty to killing four people and wounding more than 200.

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Filed under: Boston Marathon Explosion • News • Terror Attack • Terrorism
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