The suspects involved in the Boston Marathon bombing were brothers from the Russian Caucasus who moved to Kazakhstan before coming to the United States several years ago, a source briefed on the investigation told CNN.
One of the brothers, identified by several sources as Tamerlan Tsarnaev, 26, studied engineering at Bunker Hill Community College but had taken off a year to train as a boxer, the source said Friday.
The source said a posting on a social media website under his name included the comment: “I don’t have a single American friend. I don’t understand them.”
He died at a hospital overnight after a gun battle with police, authorities said. A source briefed on the investigation says Tsarnaev was wearing explosives and an explosive trigger when his body was recovered.
Several sources identified the other brother, who remained on the lam, as Dzhokhar Tsarnaev, 19.
The source briefed on the investigation added that it should not be assumed that the brothers were radicalized because of their origins in the Russian Caucasus.