A man in western Congo died Thursday with hemorrhagic fever symptoms, leading officials to suspect that a still-unidentified virus may be involved alongside malaria in a mysterious outbreak that has killed dozens of people,

Congo’s health ministry told Reuters earlier this week that malaria was the culprit: “The mystery has finally been solved. It’s a case of severe malaria in the form of a respiratory illness,” it said Tuesday in a statement, according to Reuters. The ministry did not respond to multiple inquiries from NBC News.

"The mystery has finally been solved," Congo's health ministry says, after an unidentified disease outbreak started killing mainly women and children in a remote region.