Health officials in Nigeria are scrambling to figure out a 'mystery' disease that's killed 18 people.
A local doctor told CNN the victims have died within 24 hours of showing symptoms and five people are currently being treated.
The outbreak started on April 13 in Ondo in the southeastern part of the country and those affected are between the ages of 25 and 60. Officials say the disease does not appear to be contagious at this time.
Symptoms reportedly include headache, blurred vision, loss of sight and unconsciousness.
Some suspect the illnesses may be the result of locally brewed alcohol, and doctors say they plan to carry out tests on one victim who died in a hospital.
The World Health Organization's Gregory Härtl said in a tweet that Ebola has been ruled out as well as any other virus or bacterial infection. The "current hypothesis is herbicides."
See how Nigeria dealt with the Ebola outbreak of 2014 in the gallery below:
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