Officials in the Democratic Republic of Congo updated the death toll from the Ebola outbreak to 204 late Saturday, hours after the Red Cross said three volunteers had died there and Uganda confirmed three new Ebola cases.
A health ministry statement said 204 deaths had been recorded in three provinces of the vast central African country, from 867 suspected cases.
The World Health Organization has declared the outbreak of the highly contagious haemorrhagic fever an international emergency.
The African Union's health agency warned that more countries on the continent were at risk of being affected by the Ebola virus, in addition to the DRC and Uganda.
"We have 10 countries at risk," said Jean Kaseya, head of the Africa Centres for Disease Control and Prevention, listing Angola, Burundi, the Central African Republic, the Republic of Congo, Ethiopia, Kenya, Rwanda, South Sudan, Tanzania and Zambia.
Kaseya said "high mobility and insecurity" in the region were helping spread the disease.
The new cases confirmed in Uganda on Saturday bring to five the total confirmed in the east African country since it was detected there and in the DRC on May 15.
One person in Uganda has died.
Ebola is a deadly viral disease that spreads through direct contact with bodily fluids.
