The younger Boston Marathon bombing suspect left behind a message in the boat where he was captured, CBS News reports.
A law enforcement source said Dzhokhar Tsarnaev penned a note inside the wall of the vessel saying April 15 attack was in retaliation for Muslims killed by U.S. forces in Iraq and Afghanistan.
"When you attack one Muslim, you attack all Muslims," Tsarnaev wrote.
Tsarnaev also wrote that he would join his older brother soon as a martyr in paradise.
The 19-year-old is being held at a prison medical center outside of Boston.