Boston Update: Who Is Tamerlan Tsarnaev?

BOSTON (AP) — Tamerlan Tsarnaev practiced martial arts and boxing, even aspiring to fight on the U.S. Olympic team. Dzhozkar Tsarnaev had been on the wrestling team at a prestigious high school and won a scholarship from the city to pursue higher education. Neighbors recalled the ethnic Chechen brothers, living on a quiet street in Cambridge, Mass., riding bikes and skateboards.

Two brothers, one dead, one alive and at large. After hours of only grainy images of two men in baseball caps to go on, a portrait gradually emerged Friday of the men suspected in the Boston Marathon bombing.

The brothers, who came from a Russian region near Chechnya, lived together on Norfolk Street in Cambridge. They had been in the country for about a decade, according to an uncle, Ruslan Tsarni of Montgomery Village, Md.

Less was immediately known about Tamerlan, believed to be 26 when he was killed overnight in a shootout. He was the stockier one identified in video released to the public, wearing a black baseball cap and khaki pants. He was involved in martial arts, and competed in boxing matches. According to a crime website he was once arrested for domestic assault on a girlfriend.

"I don't have a single American friend. I don't understand them." he was quoted as saying in a photo package that appeared in a Boston University student magazine in 2010.

He identified himself as a Muslim and said he did not drink or smoke: "God said no alcohol." He said he hoped to fight for the U.S. Olympic team and become a naturalized American. He said he was studying at Bunker Hill Community College to become an engineer