The first person to be diagnosed with Ebola within the US has died, Texas hospital officials have said.
Thomas Duncan, who caught the virus in his native Liberia, was being kept in isolation in a Dallas hospital following his diagnosis last month.
Earlier the US announced new security procedures at entry points to check travellers for symptoms of the virus.
More than 3,000 people have died in West Africa in the worst Ebola outbreak yet.
While Mr Duncan was the first person to be diagnosed within the US, three American aid workers and a photojournalist contracted the virus in Liberia.
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