Calls for investigation after "massacre" in Nigeria

Human rights advocates have called for an investigation following the Nigerian army's raid on a Shiite sect in which hundreds of people were reportedly killed.
Amnesty International said in a statement late Tuesday that the shooting of members of the Shiite group in Zaria "must be urgently investigated ... and anyone found responsible for unlawful killings must be brought to justice."
The bloodshed was yet another blow to Africa's most populous nation, already beset by a 6-year-old insurgency waged by Boko Haram, a violent Islamic group which is at odds with the Shiites and others who oppose its extremist views.