Civilians may have been `` caught in the crossfire , '' official says . The Nigerian military has been working to root out militants in Delta State . One of the most prominent rebel groups , the Movement for the Emancipation of the Niger Delta , and other militant groups say they 're fighting for a fairer distribution of the region 's oil wealth . A U.S. drone strike killed at least 10 people and wounded more than 20 others on Sunday near a village in northeastern Nigeria, officials said. The military has denied the allegations .
Civilians may have been `` caught in the crossfire , '' official says . The Nigerian military has been working to root out militants in Delta State . A U.S. drone strike killed at least 10 people and wounded more than 20 others on Sunday near a village in northeastern Nigeria, officials said. The military has denied the allegations .