Energy firm , former vice president charged with bribery . They may agree to plea deal requiring payment of $ 120 million , Nigerian official says . Case involves allegations of bribes to Nigerian officials for natural gas project . Babafemi pleaded guilty to bribery charges in London the 1990s .
Energy firm , former vice president charged with bribery . They may agree to plea deal requiring payment of $ 250 million , Nigerian official says . Case involves allegations of bribes to Nigerian officials for natural gas project . Halliburton pleaded guilty to bribery charges in U.S. last year .