Nigeria's restive southeastern state of Anambra goes to the polls to elect a new governor in a ballot seen as a test of the country’s electoral system less than a year and a half before the national ballot to replace President Muhammadu Buhari. More than 30,000 police officers have been dispatched to secure Anambra after a string of attacks in the southeast blamed on separatists from the Indigenous People of Biafra (IPOB) who campaign for an independent state for the local Igbo people. IMAGES