A breaking story from the BBC:
UN peacekeepers were the most likely source of the cholera epidemic sweeping Haiti, according to a leaked report by a French disease expert.
Epidemiologist Renaud Piarroux conducted research in Haiti on behalf of the French and Haitian governments.
Sources who have seen his report say it found strong evidence that the cholera outbreak was caused by contamination of a river by UN troops from Nepal.
The UN said it had neither accepted nor dismissed the findings.