Police are having to guard an Ebola clinic in Sierra Leone after allegations by a former nurse that the virus was invented to conceal "cannibalistic rituals" there.
Thousands gathered outside the country's main treatment centre in Kenema threatening to burn it down and remove the patients, after hearing the former nurse claim that the disease was "unreal and a gimmick aimed at carrying out cannibalistic rituals".
Officers fired tear gas to disperse the angry crowds, a regional police chief said.
The increased security comes after Nigeria placed all of its entry ports on "red alert" after a Liberian man died after arriving at Lagos airport last week, in the first case in the country.
At least 660 people have died from the illness across Sierra Leone, Guinea, Liberia and Nigeria.
UK trials of a vaccine for the Ebola virus began today - but some experts complain that the response has been a long time coming.
A Swansea doctor who took leave to treat Ebola patients in Africa, is back on the wards after three weeks in isolation.
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