Nigeria Urged to Investigate Detainee Deaths

Amnesty International says hundreds of people have died in Nigerian military detention centers from mistreatment or neglect this year. The group says the detainees are usually suspected of being associated with Boko Haram, a militant group that has been terrorizing northern Nigeria for nearly four years.
 
Last May, Nigeria began its largest-ever assault on Boko Haram after President Goodluck Jonathan declared a state of emergency in three northeastern states.
 
Officials say …