Botswana's government has disputed the result of Zimbabwe's general election which saw the long-standing president Robert Mugabe claim a landslide victory.
Its assessment stands in stark contrast with that of South Africa, which has congratulated Mr Mugabe on his victory.
Both nations belong to the Southern African Development Community which monitored the vote, and now appears to be divided.
The Botswana government said that although the election day itself had been "free of overt intimidation and violence", the electoral process "cannot be considered as an acceptable standard for free and fair elections".
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.