The UN mission gave few details about the allegations other than to say that the suspect is a civilian. Thirteen of the 17 cases involve UN peacekeeping personnel, it said.
The UN mission "condemns in the strongest possible terms any instance of sexual exploitation and abuse committed by UN personnel in the CAR," said the statement issued today.
Local authorities have been informed that the UN is conducting an internal investigation, said Dujarric. If the case goes forward, the person will have no UN immunity, he said.
Central African Republic has been rocked by violence between Muslims and Christians since mostly Muslim rebels overthrew the president in 2013. Thousands have died, while hundreds of thousands have fled to neighboring countries.
The UN took over peacekeeping duties from an African Union force in April 2014. Member states have the sole responsibility to prosecute their troops, but a UN investigative report released this summer showed that countries can take little action.