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Medical experts prepare to discuss experimental treatment for ebola amid a surge in deaths from the virus.
The number of people killed in the West African ebola outbreak has reached 932 after 45 deaths in three days.
Latest figures from the World Health Organisation (WHO) showed the number of suspected cases rose by 108 in the same period, between August 2 and 4.
Most of the new cases were in Liberia.
The surge in deaths came as WHO prepared to convene a panel of medical ethics experts to explore the use of experimental treatment for ebola.
WHO Assistant Director-General Marie-Paule Kieny said in a statement. "We need to ask the medical ethicists to give us guidance on what the responsible thing to do is."
More than 1,700 people have now been infected - or are suspected of being infected - since the tropical virus broke out earlier this year.
Among the most recent casualties is a Saudi Arabian who died of a heart attack in Jeddah on Wednesday.
He had travelled to Sierra Leone on business and had symptoms similar to those found in people suffering from ebola.