Zimbabweans line up in front of a temporary polling station in Harare to vote in the general election on July 31, 2013.

Harare -

The African Union says it is reserving its judgment on whether Zimbabwe's elections were systematically flawed until details of the disputed vote are clarified.

The head of the AU’s 70-member observer mission, Olusegun Obasanjo, said on Friday 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 in Wednesday's vote.

The party of President Robert Mugabe is claiming a landslide victory.

Mugabe’s main challenger, Prime Minister Morgan Tsvangirai, has alleged massive rigging and declared the election “null and void”. - Sapa-AP