Seven Tanzanian government ministers have lost their parliamentary seats to the opposition Ukawa coalition, partial results from Sunday’s vote show. It is the biggest shock of the election so far which is the most competitive in the country’s history, according to agencies. The electoral commission has until Thursday to announce the final results. Observers from the European Union have given a positive assessment of the polls. But they raised several concerns - including the apparent failure of state media to give fair and equitable coverage to the opposition in the build-up to the election. The opposition Ukawa coalition on the semi-autonomous archipelago of Zanzibar has expressed concerns about the results announced so far. Residents on the islands also voted for their own president and members of the Zanzibar parliament on Sunday. CUF, one of four parties which make up Ukawa, has accused the Zanzibar electoral commission of only releasing results from constituencies where the CMM candidate has won. On Monday, Ukawa candidate Seif Sharif Hamad declared himself the winner of the Zanzibari presidential poll. Correspondents say tension has been rising on the islands ahead of the final results, expected on Tuesday. Previous elections have turned violent on Zanzibar, which is made up of the islands of Unguja and Pemba and is a popular with tourists. In the presidential race, John Pombe Magufuli, the candidate of the ruling CCM party remains ahead of his closest challenger, Edward Lowassa of Chadema party. Lowassa is a former Prime Minister but he defected to the opposition after he failed to get the CCM ticket for the presidency.