The UN secretary general has urged Ivory Coast’s internationally-backed president to investigate hundreds of deaths blamed partly on his supporters.
Ban Ki-moon said he was “concerned and alarmed” about the reports, from the town of Duekoue, but Alassane Ouattara said his followers were not involved.
UN forces are now guarding thousands of civilians taking refuge at a church.
In Abidjan, fighting has continued between troops loyal to Mr Ouattara and those of his rival, Laurent Gbagbo.
Pro-Ouattara forces have beaten back Laurent Gbagbo, to a few key locations, but witnesses say the city is now quieter.