Liberia will receive an untested experimental drug, Zmapp, to treat people infected with Ebola, the Liberian government says.

The news came as medical ethics specialists met in Geneva to explore the use of such new treatments.

The World Health Organization, which is hosting the meeting, says some 1,013 have died from Ebola in West Africa.

US government officials said their role had been to put Liberian officials in contact with Zmapp maker Mapp Biopharmaceutical.

'No cost'

The pharmaceutical company said its supply of the drug was exhausted after its supplies were sent to West Africa, AFP news agency reported.

The drug was "provided at no cost in all cases," the company added.

Zmapp has been used in the US on two aid workers who have shown signs of improvement, and a Roman Catholic priest, infected with Ebola in Liberia, who is currently being treated in a hospital in Madrid.

However, the drug has only been tested on monkeys and has not yet been evaluated for safety in humans.

The World Health Organization (WHO) will announce the outcome of its emergency meeting on the role of experimental drugs on Tuesday.

No rock and hard place

Earlier, Ivory Coast announced it had banned all passenger flights from the three countries hit the worst by the spread of Ebola: Guinea, Liberia and Sierra Leone.

It is the second country, after Saudi Arabia, to impose such a ban in a bid to prevent the spread of the deadly virus.

There is no cure for Ebola, which has infected at least 1,779 people since the outbreak was first reported in Guinea in February.

The Liberian government was aware of the risks associated with Zmapp, but the alternative was to allow many more people to die, Information Minister Lewis Brown told the BBC on Monday.

"The alternative for not testing this is death, a certain death," he said,

"This is not even the rock and the hard place for us," he said, referring to the country's health services, which he says are overburdened with patients carrying the disease.

The situation has prompted poorly equipped health workers to abandon work and institutions to close to the public.

Ebola's initial flu-like symptoms can lead to external haemorrhaging from areas like eyes and gums, and internal bleeding which can lead to organ failure. Patients have a better chance of survival if they receive early treatment.

Source: BBC