The Red Cross says the attacks happened in Duekoue in the west
France has sent extra troops to Ivory Coast's main city, Abidjan, and taken control of its airport.
It comes as fighting continued between forces loyal to the UN-recognised president, Alassane Ouattara, and his rival, incumbent Laurent Gbagbo.
The city's pro-Gbagbo TV station called for people to mobilise against the French '"occupation".
An adviser to Mr Ouattara said his forces were preparing a final push to depose Mr Gbagbo, AP reports.
France has sent an extra 300 soldiers to Ivory Coast, military spokesman Thierry Burkhard said, taking the total French force to about 1,400.
The airport had been secured by UN troops since Friday, but the French move meant the airport was now able to re-open, Mr Burkhard said.
He said there were no immediate plans to start evacuating foreigners.
More than 1,500 foreigners are sheltering in a French army camp.
They include about 700 French nationals, some 600 Lebanese citizens and 60 Europeans of assorted nationalities, French media report.
'Lives at stake' Ivorian state TV, which is controlled by Mr Gbagbo, accused the French troops of preparing a genocide like the one in Rwanda in 1994, when more than 800,000 people were killed.
A strap line on state TV on Sunday read: "[French President Nicolas] Sarkozy's men are preparing a Rwandan genocide in Ivory Coast. Ivorians, let us go out en masse and occupy the streets. Let us stay standing."