The attackers , who posed as soldiers , told residents they had come to protect them from Boko Haram and asked them to assemble . Heavily armed attackers dressed as soldiers kill 400 to 500 people , witnesses said . Some flee to neighboring Cameroon and into the Cameroon Mountains on the border . Insurgents still control the area , ` ` and residents ' n't go back to bury the dead , '' he says . Insurgents destroyed mobile phone towers in the region , making communication difficult .
Heavily armed attackers dressed as soldiers kill 400 to 500 people , witnesses said . Some flee to neighboring Cameroon and into the Cameroon Mountains on the border . Insurgents still control the area , ` ` and residents ' n't go back to bury the dead , '' he says . Insurgents destroyed mobile phone towers in the region , making communication difficult .