HARARE. President Robert Mugabe’s party has won at least a two-thirds majority in in the Zimbabwean parliament, enough to amend the country’s constitution, according to a tally of official results.Friday’s results showed Mugabe had won 142 seats of 180 for the 210-member chamber declared by the Zimbabwe Electoral Commission.Mugabe’s rival and prime minister, Morgan Tsvangirai, has called the poll a "huge farce”, amid allegations of electoral irregularities and manipulation.Tsvangirai’s Movement for Democratic Change (MDC) said it could take to the streets to challenge the result if the 89-year-old leader and his party, ZANU-PF, won the vote.‘Fairly fair’The African Union’s observer mission chief declared Zimbabwe’s elections as "fairly fair” and credible, while observers from the Southern African Development Community (SADC) praised them for being free and peaceful.The AU said on Friday it was reserving its judgment on whether the elections were systematically flawed until details of the disputed vote were clarified. The SADC added that it was too early to declare Zimbabwe’s disputed election fair.However, former Nigerian President Olusegun Obasanjo, who heads the AU’s vote monitoring mission, said on Friday that flaws in the electoral process had not stopped the will of the people from being expressed.Obasanjo told Al Jazeera that the assessment that the AU mission had of the presidential and general elections was that they were "fairly fair”."We justified that by  the process which led to the election itself - it was free,” he said.Independent assessors had found a bias in Zimbabwe’s media and said that though 99.97 percent of rural voters were registered, only 67.94 percent of urban voters made it to the voters’ roll.However, Obasanjo told Al Jazeera that the AU had a team in Zimbabwe for the election campaign from June 15 and that it had found that anyone who wanted to register had registered.Figures questioned "I do not know how people come to these figures,”  Obasanjo said of the independent assessment in his interview with Al Jazeera."You do not wait until the 31st of July to complain about registration."If the registration had not gone well you will have complained when the registration was going on or immediately after the completion of the registration.”Obasanjo said that the campaign had been fair and free and the AU had not found any issues of hindrance during the campaign.He said earlier that voting was peaceful but that observers noted "incidences that could have been avoided and even tended to have breached the law”.The mission is asking election authorities in Zimbabwe to investigate reports that large numbers of eligible voters were turned away from polling stations.The SADC said in a written statement that the elections dismissed by Tsvangirai as a sham were free and peaceful.