Nigerian forces killed hundreds of unarmed in Giwa Barracks incident: Amnesty

Amnesty International, the London-based non-governmental human rights organization, has issued a report, “Nigeria: More than 1,500 Killed in North-Eastern Nigeria in Early 2014.”
Of particular interest is its dissection of what happened on March 14 at Giwa Barracks, the largest military facility in Maiduguri, Borno State.
The report

finds that Boko Haram staged a successful break into the detention center and that it released all of those being held. Boko Haram gave those freed the option of joining them or going home. Most chose the home option. Boko Haram then withdrew.
Shortly thereafter the security forces reoccupied the facility.
With the help of the Civilian Joint Task Force, a locally based vigilante group, the security forces then hunted down all of those who had escaped and murdered most of them. Amnesty estimates that over 600 people were killed.
Amnesty’s report, which is based on eye-witness accounts, also notes that many of the inmates were emaciated and without shoes. Many also had scars indicating abuse. All of the inmates were unarmed.