United Nations peacekeepers were the most likely source of the cholera epidemic sweeping Haiti, according to a leaked report by a French expert on diseases.
Epidemiologist Renaud Piarroux conducted research in Haiti on behalf of the French and Haitian governments, the BBC reports.
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.
The Haitian government says the cholera epidemic has killed at least 2100 people and nearly 100,000 cases have been treated.