Fourth female suicide bomber hits Nigeria's Kano, kills six

KANO Nigeria (Reuters) - A female suicide bomber blew herself up in a college in northern Nigeria's biggest city of Kano on Wednesday, killing six people and critically wounding another six in the fourth such attack by a woman in Kano in less than a week, a security source said. The bomber targeted youths who were looking at a notice board for national youth service in Kano Polytechnic, the source said. (Reporting by Nneluke Ikemfuna; Writing by Tim Cocks; Editing by Alison Williams)