The West African nation of Mali, which just beat its first outbreak of Ebola, has confirmed a second one that is larger and more threatening, global health authorities said on Wednesday.

The victim who apparently began the new outbreak was an imam who fell ill in Guinea and traveled to Mali for better treatment at a major private clinic in Bamako, the capital.

The new cases will add to the mounting total of Ebola victims. In its last update on Nov. 5, the World Health Organization said there had been more than 13,000 confirmed or suspected cases in West Africa since the epidemic began. Some 5,000 have died.