Nigeria is one of world 's richest oil states ; people are among poorest in world . Militant group MEND demands profits given to Nigerian government . MEND is holding two British oil workers captive . MEND , formed in 2005 , has taken American and European oil workers hostages in the past . MEND says more oil will be seized if Nigeria does not stop producing oil illegally .
Nigeria is one of world 's richest oil states ; people are among poorest in world . Militant group MEND demands profits given to Nigerian government . MEND is holding two British oil workers captive . MEND says more oil will be seized if Nigeria does not stop producing oil illegally .