Two American aid workers, both seriously ill after being infected with the deadly Ebola virus in Liberia, will be flown to the United States and treated in isolation at an Atlanta hospital, officials said on Friday.

A plane equipped to transport Dr. Kent Brantly and missionary Nancy Writebol can carry only one patient back at a time, and Christian relief group Samaritan's Purse said it did not know who would return first.

"We have learned that we will be receiving a patient with Ebola at Emory University Hospital on Saturday," said Holly Korschun, spokeswoman for the facility where they will be treated.