Nigeria's former Defence Minister Bello Mohammed, shown in 2011. A blast went off outside a nightclub in the Nigerian capital Abuja late Friday, hours after Mohammed and the national security adviser ... more 

Nigeria's former Defence Minister Bello Mohammed, shown in 2011. A blast went off outside a nightclub in the Nigerian capital Abuja late Friday, hours after Mohammed and the national security adviser were sacked amid fears over spiralling violence in the country's north less