9 Filipinos and 5 Nigerians released Saturday , 4 Ukrainians released Sunday . Nigeria 's military started clearing the western Niger Delta region last week . Fighting against militants demanding better distribution of Nigeria 's oil wealth . Movement for the Emancipation of the Niger Delta has declared ` ` all - out war ''
9 Filipinos and 5 Nigerians released Saturday , 4 Ukrainians released Sunday . Nigeria 's military began clearing the western Niger Delta region last week . Operation against militants demanding better distribution of country 's oil wealth . Movement for the Emancipation of the Niger Delta has declared `` all-out war ''