Boston Marathon bomber sentenced to death

Boston Marathon bomber Dzhokhar Tsarnaev was sentenced to death.

Boston Marathon bomber Dzhokhar Tsarnaev has been sentenced to die by lethal injection for the 2013 terror attack.

The federal jury in Massachusetts reached the decision Friday after more than 14 hours of deliberations over three days.

The 21-year-old Tsarnaev was convicted last month of all 30 federal charges against him, 17 of which carried the possibility of the death penalty.

The bombing killed three people and injured more than 260 others. Tsarnaev killed a Massachusetts Institute of Technology police officer days later.

The defence sought to save Tsarnaev's life by pinning most of the blame on his radicalized older brother.