The UN has accused Ivory Coast state media - controlled by strongman Laurent Gbagbo - of inciting hatred against foreign peacekeepers.
UN peacekeeping chief Alain Le Roy said state TV channel RTI was pumping out lies, and blamed it for a machete attack on UN personnel on Tuesday.
Mr Gbagbo has so far resisted UN calls to step down as president and make way for his rival Alassane Ouattara.
Regional leaders are holdings talks aimed at breaking the impasse.