Dozens of children kick up the sand underneath their sandals. They're playing, but not with toys or balls. They are playing a game called "Boko Haram versussoja (soldier)".

They scamper around screaming, "shoot!", ramming their fingers into each other's bodies. Their pointed fingertips are supposed to be the barrels of rifles or blade of swords.

They are pretending to kill each other. Some "die", falling over like felled trees. One child collapses with his hand pressed over his...

Some reports suggest the death toll could be as high as 42, with dozens more injured.

The explosions happened in and around a mosque as Muslims were preparing for afternoon prayers.

No-one has yet said they were behind the bombings, but the Islamist militant group Boko Haram has launched previous attacks in Mubi.

Boko Haram has waged a campaign of violence since 2009 to try to create an Islamic state in northern Nigeria.

The violence has killed about 20,000 people...