MAIDUGURI, Nigeria (AP) — 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.

Gunmen shot the Chinese builder Friday morning on a main road that had been undergoing reconstruction in the city of Maiduguri, said the Borno State ministry of works spokesman Babakura Bukar.

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