Health officials say an outbreak of hemorrhagic fever linked to the Ebola virus has now killed 59 people in the West African nation of Guinea.

The World Health Organization (WHO) reports a total of 86 suspected Ebola cases in Guinea, 13 of which have been confirmed by lab results.

The outbreak is centered in rural parts of southeastern Guinea, including the areas of Gueckedou and Macenta.

The WHO said on its Twitter feed Monday that tests for two suspected cases in the capital, Conakry, came back negative.

Meanwhile, the Ministry of Health in neighboring Liberia reports five suspected Ebola-related deaths. It says the victims were three Liberians and two Guineans who had crossed the border from Guinea for treatment.

Ebola is one of the most highly contagious viral diseases. Symptoms include high fever, vomiting, diarrhea and bleeding.

Health officials say caretakers should minimize direct or close contact with infected patients and should wash their hands frequently.

An Ebola outbreak in Uganda in 2012 killed at least 16 people.