Angola's government says 93 people, mostly children, have died from an unidentified fever that is similar to the deadly Ebola virus.

Deputy Health Minister Jose van Dunem said Monday that 101 cases of the mysterious illness have been reported at a hospital in northern Uige province. 

Local officials are looking for two people diagnosed with the illness who left the hospital.

Mr. Van Dunem says initial tests have ruled out several common diseases, including Ebola.  But he says Angolan officials are awaiting the results of a second Ebola test from the United States.

The World Health Organization has set up a task force to begin studying the deadly fever, which involves vomiting and bloody discharges.

In recent years, Ebola outbreaks have killed hundreds of people in central and southern Africa.