Sierra Leone declared a state of emergency and called in troops to quarantine Ebola victims yesterday, joining neighbouring Liberia in imposing tough controls as the death toll from the worst-ever outbreak of the virus hit 729 in West Africa.

The World Health Organisation said it was in urgent talks with donors and international agencies to deploy more medical staff and resources to one of the world’s poorest regions.

The WHO reported 57 new deaths between July 24 and July 27 in Guinea, Liberia, Sierra Leone and Nigeria.

Authorities in Nigeria, which recorded its first Ebola case last week when a US citizen died after arriving on a flight from Liberia, said all passengers travelling from areas at risk would be temperature-screened for the virus.

Britain holds government meeting and calls Ebola a threat requiring a response

In a measure of rising inter­national concern, Britain on Wednesday held a government meeting on Ebola and called it a threat requiring a response.

The White House has also said President Barack Obama was being briefed on the situation.

The outbreak of the hemorrhagic fever, for which there is no known cure, began in the forests of remote eastern Guinea in February, but Sierra Leone now has the highest number of cases.

Sierra Leone President Ernest Bai Koroma said he would meet with the leaders of Liberia and Guinea in Conakry on Friday to discuss ways to combat the epidemic.

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