Nineteen people have been sentenced by a Russian military court in connection with a deadly attack at a concert hall. The attack resulted in 149 deaths and over 500 injuries.
Four gunmen received life sentences for their roles in the attack.
Eleven accomplices were also given life sentences by the court.
Four additional defendants were sentenced to 19 years in prison.
The incident, which occurred near Moscow, is Russia's deadliest mass shooting in two decades.