It says the killings have been carried out principally by armed forces who helped the new President, Alassane Ouattara, take power. The report came as Ivory Coast officials said they had charged 62 former army officers.
Ouattara has been president since April when his forces arrested former President Laurent Gbagbo. Gbagbo is now under house arrest in the north of the country. Some alleged killings were blamed on his allies.