I am sure many have seen these satellite pictures globally. It is reported being caused by suicide bombers.

The reports and pictures coming out of the region state the despot of Boka Harem has sent kidnapped girls into villages to kill themselves and there own people.

January 7, 2015

...“Up until now, (click here) the isolation of Baga combined with the fact that Boko Haram remains in control of the area has meant that it has been very difficult to verify what happened there. Residents have not been able to return to bury the dead, let alone count their number. But through these satellite images combined with graphic testimonies a picture of what is likely to be Boko Haram’s deadliest attack ever is becoming clearer,” Daniel Eyre, Nigeria researcher for Amnesty International, said in a statement....