Burnt our cars are seeing at the business and skills center following gun battle and explosions by the Boko Haram sect, in Potiskum, Nigeria, Saturday, Oct. 20, 2012. A Chinese construction worker has been killed in a besieged city in Nigeria's northeast, an official said Friday, exacerbating security concerns for foreign workers in Nigeria's violence-wracked northeast, while an overnight raid in a nearby city left 5 others dead and several schools razed to the ground. (AP/Photo Adamu Adamu)

Associated Press
Burnt our cars are seeing at the business and skills center following gun battle and explosions by the Boko Haram sect, in Potiskum, Nigeria, Saturday, Oct. 20, 2012. A Chinese construction worker has been killed in a besieged city in Nigeria's northeast, an official said Friday, exacerbating security concerns for foreign workers in Nigeria's violence-wracked northeast, while an overnight raid in a nearby city left 5 others dead and several schools razed to the ground. (AP/Photo Adamu Adamu)
Burnt our cars are seeing at the business and skills center following gun battle and explosions by the Boko Haram sect, in Potiskum, Nigeria, Saturday, Oct. 20, 2012. A Chinese construction worker has been killed in a besieged city in Nigeria's northeast, an official said Friday, exacerbating security concerns for foreign workers in Nigeria's violence-wracked northeast, while an overnight raid in a nearby city left 5 others dead and several schools razed to the ground. (AP/Photo Adamu Adamu)
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