A Zimbabwean diamond field said to be the largest in the world is being mined by companies staffed by Robert Mugabe's police and military chiefs who may use the proceeds to crack down on opposition supporters, Global Witness has warned.
"There is a real risk of these revenues being used to finance violence during a future election."
Military chiefs, many of whom fought under Robert Mugabe in the independence war, have already made clear that they will not allow an MDC victory.
Global Witness is appealing to the Southern African Development Community, charged with keeping the peace in Zimbabwe, to push for the cancellation of the mining contracts and greater transparency in future.
"Zimbabwe desperately needs these diamond revenues for health, education and the refinancing of its banks," said Nick Donovan, the Global Witness researcher who compiled the report. "It does not need it to be spent on AK47s or the repression of its people."