A doctor from Sierra Leone who was leading the fight to battle the deadly Ebola virus outbreak there has died from the disease, officials in that country said.

Dr. Sheik Umar Khan died at a Doctors Without Borders facility in Kailahun, Sierra Leone, said Dr. Brima Kargbo, chief medical officer of the country's Ministry of Health and Sanitation. Speaking to the Los Angeles Times by phone, Kargbo said Khan had died Tuesday afternoon.