Health authorities in Ghana are testing blood samples from a 12-year-old girl who died of a viral fever with bleeding, in the country's first suspected case of Ebola disease, officials said on Sunday.

More than 90 people have died of Ebola in Guinea and Liberia, and there is a reported case in Mali.

Medical charity Doctors Without Borders has warned of an unprecedented epidemic in an impoverished region with weak health services.

The outbreak in Guinea is the first time the disease, epidemics of which occur regularly in Central Africa, has appeared in the country. Infected patients initially went undiagnosed for several weeks before tests confirmed Ebola.