The authorities in New Caledonia have confirmed that three people have been infected with chikungunya.
A woman with chikungunya was identified in Poindimie in the far north.
She had come from the Noumea area where authorities believe she was infected with the mosquito-borne disease, which has spread from Indonesia to Papua New Guinea.
This comes as health services are stretched by a dengue outbreak, which this season has affected more than 8,000 people and killed three.
The head of Public Health, Dr Jean Paul Grangeon, has appealed to the public to be very vigilant and to take measures to eliminate breeding grounds for the mosquitos.
He says chikungunya symptoms, such as fever and pains, are more severe than dengue, with possible relapses for several years.