19 of his followers are also arrested . Nigerians authorities freed the Fifty-one hostages earlier this week . The Movement for the Emancipation of the Niger Delta is one of several militant groups in the region that has been battling the government for years over the distribution of the country 's oil wealth . Nigeria has launched a major offensive in Niger Delta region .
19 of his followers are also arrested . Nigerians authorities freed the Fifty-one hostages earlier this week . Nigeria has launched a major offensive in Niger Delta region .