Survivors of Nigeria's Christmas Day church bomb blasts hold prayers to commemorate those who died in the attack on the outskirts of capital Abuja.<br/> Sunday's blast killed at least 27 people and injured dozens more.<br/> The Islamist militant group Boko Haram said it planted the bombs.<br/> Boko Haram wants to impose Islamic sharia law across the country split roughly equally between Christians and Muslims.<br/> A total of five bombs exploded on Christmas Day in several parts of northern Nigeria.<br/> Deborah Lutterbeck, Reuters
