Boston marathon bombings suspect wrote a message in a boat where he hid after the blasts, describing victims of the attack as 'collateral damage'.
US media reported that in the note, Dzhokhar Tsarnaev also reportedly also wrote that his brother was a martyr, adding that when one Muslim is attacked, all Muslims are attacked.
The note said that the blasts were retribution for the US wars in Iraq and Afghanistan, the BBC reports.
Tsarnaev was captured in the boat during the manhunt after the bombs.
According to the report, the part of the vessel on which the 19-year-old wrote the message may have to be cut from the hull and presented in court as evidence should he go to trial, an anonymous source told the New York Times.
The blasts left three people dead and 264 injured at the finish line of the city's marathon on 15 April.