At least 60 people were killed when two suicide bombers detonated explosives in a camp for internally displaced people in north eastern Nigeria, relief workers said Wednesday according to dpa. The attacks were carried out by two teenage girls in Dikwa, 90 kilometers north-east of Maiduguri in Borno state, while hundreds of people who were standing in line to collect food, one relief worker, who asked to remain anonymous, told dpa. A third attacker who infiltrated the camp was arrested before she could detonate her device. Dikwa provides sanctuary for thousands of people who have been displaced by attacks carried out by Boko Haram terrorist group. An official of the National Emergency Management Agency told dpa that 78 people sustained "various degrees of injuries" in the attack.