The rebel group that has brought chaos to Nigeria's oil producing region on Friday ended a 90-day ceasefire and warned the oil industry and military to brace for attacks.
The Movement for the Emancipation of the Niger Delta (MEND) has waged a three-year campaign demanding a bigger share of the oil wealth for the local population, severely cutting daily production. But the government says many of its fighters have laid down their arms in a recent amnesty.
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