The Democratic Republic of Congo, where the Ebola virus was first identified in 1976, has confirmed an outbreak of a different strain of the disease in the northern part of the country.
Health Minister, Felix Numbi, told the BBC that tests on two people had confirmed the disease in Equateur province, where 13 had already died.
But he said the deaths occurred in an isolated area and the disease seemed a different strain to West Africa’s.
Dr Numbi said a quarantine zone was being set up to contain the disease.
The cases are the first reported outside West Africa since the outbreak there began.
So far 1,427 people have died from the virus.
The speed and extent of the outbreak has been “unprecedented”, the World Health Organization (WHO) says.
An estimated 2,615 people in West Africa have been infected with Ebola since March.
Several people died in the past month after contracting an unidentified fever in the Equateur region of the Democratic Republic of Congo.
Dr Numbi said a quarantine zone would be set up in a 100-km (62-mile) radius in Boende where the cases had been registered.
He said this marked the seventh outbreak in DRC.
Mr Numbi added that further tests were being carried out.