Boston Marathon Bombing

Officials Say the Tsarnaev Brothers Were Motivated by Radical Islam

Bombing of Boston Marathon killed three and injured over 180

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The two brothers suspected of bombing the Boston Marathon appear to have been motivated by a radical brand of Islam, but they do not seem connected to any Muslim terrorist groups, US officials have said.

Authorities have interrogated and charged the surviving brother Dzhokhar Tsarnaev with crimes that could bring the death penalty.