Tanzania's ruling party CCM looks set for poll win, opposition cries foul

Election workers prepare to count ballots after presidential and general elections using an electric lamp to light the space at a polling station in Dar es Salaam on October 25, 2015. Tanzanians voted in presidential and general elections on October 25, in what is expected to be the tightest race in the history of east Africa's most populous country. [Photo: AFP]

Tanzania's ruling party looked set to win presidential and parliamentary elections on Sunday despite a challenge to its five decades in power from former Prime Minister Edward Lowassa, who has voiced concerns the poll may not be free or fair.

Late on Sunday Chadema party, part of the opposition coalition led by Lowassa, said police raided its vote-tallying centre in Tanzania's commercial capital Dar es Salaam and arrested opposition officials.