Nigeria cracks down before World Economic Forum event

BBC Online :
Nigerian security forces have detained several people in Abuja over recent bomb attacks, days before a World Economic Forum event in the capital.
Most of those held were said to be foreign, but no details were announced.
Officials have ordered schools and government offices to close during the WEF event, which be attended by the presidents of Rwanda, Senegal and Kenya as well as Chinese Premier Li Keqiang. The government is under pressure to tackle widespread unrest.
An explosion late on Thursday killed 19 people, two weeks after a nearby bombing left 75 dead.
No group has said it carried out the attacks, but Islamist militant group Boko Haram is being blamed.
A spokesman for the Ministry of Defence said those detained on Saturday were being interrogated and had provided “useful information.”
Boko Haram is also believed to be behind the kidnapping of more than 200 teenage girls from their school in Borno state in north-eastern Nigeria more than a fortnight ago.