Sierra Leone is accusing the World Health Organization of being "sluggish" in facilitating an evacuation of a doctor who died from Ebola before she could be sent out of the country for medical care.

Dr. Olivet Buck died Saturday, hours after the U.N. health agency said it could not help evacuate her.

At a news conference Monday, a government official read a statement saying that the Buck is the second Sierra Leonean doctor to die because negotiations on evacuation had dragged on. Dr. Sheik Humarr Khan was being considered for evacuation when he died of the disease in July.

The World Health Organization responded Monday that it can only evacuate its own staff and that, given the number of health workers becoming infected, the solution is not to evacuate everyone.