Nigerian militant group says it struck Shell and Agip crude trunk lines . Shell said it is investigating reports of an attack on the Nembe creek pipeline . An area of rich biological diversity , the region contains the world 's third-largest wetland with the most extensive freshwater swamp forest , according to the UNDP . The U.S. State Department has warned Americans to avoid travel in Nigeria because of a recent spate of kidnappings by suspected Boko Haram militants.
Nigerian militant group says it struck Shell and Agip crude trunk lines . Shell said it is investigating reports of an attack on the Nembe creek pipeline . The U.S. State Department has warned Americans to avoid travel in Nigeria because of a recent spate of kidnappings by suspected Boko Haram militants.