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An US federal jury sentenced on Friday Dzhokhar Tsarnaev, one of the 2013 Boston Marathon bombers, to death.

The ruling constitutes the first instance in the post-9/11 era in which federal prosecutors win a death penalty in a terrorism case, the CNN reports.

A US jury on May 15 sentenced 21-year-old Dzhokhar Tsarnaev to death for his role in the 2013 Boston Marathon bombings, one of the worst assaults on American soil since the September 11, 2001 attacks.