CBS News reports that Boston bombing suspect Dzhokhar Tsarnaev wrote a note before his capture in which he called those killed and wounded in the attack ''collateral damage'' for United States action in Afghanistan and Iraq.
He also reportedly scribbled on the inside wall of the boat where he hid from police in the latter stages of a massive manhunt, that ''When one Muslim is attacked, all Muslims are attacked'.
Twin explosions near the finish line of the marathon on 15 April killed three people and wounded more than 260.
Dzhokhar, 19, also said he did not mourn the death of his older brother Tamerlan, 26, who was killed in a shootout with police, saying he was a martyr.
Federal prosecutors have charged Dzhokhar with using and conspiring to use a weapon of mass destruction. He faces the death penalty if found guilty.