DAKAR, Senegal ? A triple suicide bombing Saturday at a market on an island in Lake Chad killed at least 15 people and injured 130, Chad's government said. A top police official blamed the carnage on Nigeria's Islamic extremist group Boko Haram. The three explosions on Koulfoua were carried out by females, said Chad police spokesman Paul Manga. Police, military and local officials had earlier said at least 27...