New Delhi, Aug. 13 -- Congo's Ebola outbreak has spread to a sixth province, raising fresh concerns over the rapid pace of transmission and the ability of health authorities to contain the disease.

A death was reported in Bas-Uele province, which had not previously recorded cases in the current outbreak, Africa CDC Director-General Jean Kaseya said on Thursday (August 13). The man had travelled from Isiro in neighbouring Haut-Uele province to Buta, the capital of Bas-Uele, where he died.

The development comes as the World Health Organization warns that the outbreak in eastern Congo could become the deadliest Ebola epidemic in history.

More than 4,500 cases and 2,100 deaths have been reported, according to the latest government figures ...