With Tanzania's elections just days away, the main opposition party, Chadema, says it has uncovered election irregularities that could compromise the outcome of the polls. Chadema claims that the voter's roll has been manipulated to benefit the ruling party. Sunday's election will be the most tightly contested in Tanzania's history and the opposition hopes to end the ruling Chama Cha Mapinduzi's 54 years in power. Shingai Nyoka reports