Members of volunteer group Hisbah screen Muslim worshippers heading for Friday prayers in Miyetti
Members of volunteer group Hisbah screen Muslim worshippers heading for Friday prayers in Miyetti, Gombe January 30, 2015. Volunteers are trying to heighten security around several mosques in Gombe following an attack outside a mosque during prayers by Boko Haram militants. REUTERS/ Afolabi Sotunde (NIGERIA - Tags: CIVIL UNREST)