Ex-militant leader arrested over bombings

South African authorities have arrested an ex-leader of a militant group that claimed responsibility for a dual car bombing that killed 12 people in Nigeria, a Nigerian secret police spokeswoman said Saturday.
The arrest of Henry Okah, a former leader of the Movement for the Emancipation of the Niger Delta, came as Nigeria's secretive State Security Service acknowledged it received a warning about the impending attack long before the bombs exploded Friday.
Nonetheless, the militant group was still able to detonate the explosives only a 10-minute walk away from a ceremony in Nigeria's capital Abuja attended by the president and other dignitaries in the oil-rich nation.
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