At least 21 people were killed when a bomb exploded in a shopping mall in Abuja. 

The national police of Nigeria are reporting 21 deaths and 17 injuries in an explosion that hit a shopping plaza in Abuja, the nation's capital, earlier today. No entity has claimed responsibility for the blast. Boko Haram, the militant group behind the recent kidnappings of dozens of Nigerian girls, claimed two attacks in Abuja in April that together killed 120 people, and warned of further violence.