Boko Haram jihadis posed for photos somewhere in north-eastern Nigeria . The Nigerian government has been criticised by human rights groups and the UN over its handling of the crisis. Fighters pose with guns and alongside ISIS ' sinister black and white flag . ISIS branding suggests the terrorists now controls Boko Haram releases . Release comes as Nigerian soldiers stormed the Islamists final remaining stronghold in the country .
Boko Haram jihadis posed for photos somewhere in north-eastern Nigeria . They are the first images of the terror group since it became part of ISIS . Fighters pose with guns and alongside ISIS ' sinister black and white flag . ISIS branding suggests the terrorists now controls Boko Haram releases . Release comes as Nigerian soldiers stormed the Islamists final remaining stronghold in the country .