A bomb site in Abuja, Nigeria.<br/> A wave of bomb attacks across the country targeting churches has left at least 27 people dead.<br/> The Islamist militant group Boko Haram, which wants to impose Islamic sharia law across the country, is claiming responsibility for the attacks.<br/> A church priest spoke about the losses<br/> (SOUNDBITE) (English) CHURCH PRIEST, PATRICH ACHI, UNNAMED, SAYING:<br/> "Households, entire households gone. The two very close to the front in there - the first ones there - there were five people (in the family). And the people on the (inaudible) were three. All gone."<br/> Nigerian security forces are tracking down suspects, and have deactivated at least two explosive devices.<br/> (SOUNDBITE) (English) MILITARY TASK FORCE SPOKESPERSON, CHARLES EZEOCHA, SAYING:<br/> "We lost one policeman, and we have made four arrests. I think it is a headway, and we can use them to get more information and then work on that."<br/> Boko Haram has emerged as the biggest security threat in Nigeria, a country of 160 million split evenly between Christians and Muslims.<br/> Last Christmas Eve, a series of bomb blasts killed 32 people<br/> Deborah Lutterbeck, Reuters
