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Construction workers pour diesel into a bulldozer at the Nigerian Maritime University construction sites in Okerenkoko, Warri South-West Local Government Area in the Gbaramatu Kingdom on June 8, 2016. The completion of the Nigerian Maritime University in Okerenko has become one of the key demands of the Niger Delta Avengers, a new militant group in the Niger Delta who are vowing to cripple the Nigerian economy by blowing up oil pipelines and bring oil production to a halt. / AFP / STEFAN HEUNIS (Photo credit should read STEFAN HEUNIS/AFP/Getty Images)

Construction workers pour diesel into a bulldozer at the Nigerian Maritime University construction sites in Okerenkoko, Warri South-West Local Government Area in the Gbaramatu Kingdom on June 8, 2016.
The completion of the Nigerian Maritime University in Okerenko has become one of the key demands of the Niger Delta Avengers, a new militant group in the Niger Delta who are vowing to cripple the Nigerian economy by blowing up oil pipelines and bring oil production to a halt.  / AFP / STEFAN HEUNIS        (Photo credit should read STEFAN HEUNIS/AFP/Getty Images)