In Nigeria, 20 people have been killed in an attack by suspected Boko Haram extremists in northeastern village of Mandarari. <br/><br/>A local official said, at least three suicide bombers entered the market last evening posing as buyers, then went to the nearby camp for people displaced by Nigeria's conflict and simultaneously detonated their explosives.<br/>' <br/>As many as 80 injured persons were rushed to the hospital in Maiduguri. Boko Haram has reportedly killed more than 20,000 people so far in its eight-year insurgency.<br/>