Fifty - five of his associates are also arrested . They were 12 Nigerians , two Americans , two Frenchmen , one Canadian and two Indonesians . Nigerian authorities released the 19 hostages earlier this week . Nigeria has launched a major offensive in the Niger Delta region .
Fifty - five of his associates are also arrested . Nigerian authorities released the 19 hostages earlier this week . Nigeria has launched a major offensive in the Niger Delta region .