The African Union has said it is reserving judgement on whether Zimbabwe's elections were systemically flawed until further details of the disputed vote are clarified.
The head of the AU's observer mission, Olusegun Obasanjo said that voting was peaceful, and that "could have been avoided and even tended to have breached the law."
The mission is asking authorities to investigate reports that large numbers of eligible voters were turned away from polling stations on Wednesday.
Members of Zimbabwe's opposition say they have been targeted by Mugabe supporters following the president's re-election.
President Robert Mugabe's declaration as winner has been met by international concern over the conduct of the African nation's poll.
Robert Mugabe has secured his grip on power in Zimbabwe today after his party ZANU PF won a majority in parliament in Wednesday's election.