The Nigerian Army killed approximately 600 people after a Boko Haram attack on a military barracks, according to Amnesty International.
The military raid in the city of Maiduguri saw escaped detainees captured and killed, eyewitnesses told Amnesty.
Boko Haram militants allegedly freed hundreds of Islamists before many were extrajudicially killed by Nigerian soldiers.
“I saw the soldiers asking the people to lie on the ground,” a witness told Amnesty.