Simon Munzu said his staff had verified some cases, while others were reported by families.[break]
But he said a campaign of intimidation by incumbent President Laurent Gbagbo´s supporters appeared to have receded.
Kenyan Prime Minister Raila Odinga is travelling to Abidjan to help try and resolve a post-election stalemate.
Gbagbo has so far refused demands from the world community to stand down in favour of his rival in the 28 November presidential polls, Alassane Ouattara, who is internationally recognised as the victor.
Odinga, the African Union´s representative, is due to travel from Nigeria - where he has held discussions with President Goodluck Jonathan - to meet Gbagbo and Ouattara.
He will join a mission from the West African regional group, Ecowas, including the presidents of Benin, Cape Verde and Sierra Leone.
Sierra Leone´s information minister, Ibrahim Ben-Kargbo, told the BBC the leaders will call on Gbagbo to step down, and did not intend to negotiate with him.
Meanwhile, the Associated Press reported that the United Nations on Monday said it will do everything it can to locate areas where human rights abuses have allegedly occurred in Ivory Coast following disputed presidential elections.
Human rights groups have alleged that security forces loyal to incumbent Gbagbo have been abducting political opponents in recent weeks. The UN also believes up to 80 bodies may have been moved to a building nestled among shacks in a pro-Gbagbo neighborhood.
The UN has said the volatile West African nation once divided in two faces a real risk of return to civil war, but a top ally of Alassane Ouattara, the man widely recognized as Ivory Coast´s president, said this war has already begun.
"In any country that records more than 200 dead in five days, as the UN has certified, it´s war. When a country experiences a massive population flight of the population — more than 20,000 Ivorians who leave their country to seek refuge in a country like Liberia — it´s war," Ouattara´s Prime Minister, Guillaume Soro, told The Associated Press.
Related story
Ivory Coast company brings Black dolls to African children
