Congo, July 15 -- The Congolese health ministry confirmed an Ebola case in Goma late Sunday, marking the first time the virus has reached the city of more than 2 million people along the border with Rwanda since the epidemic began nearly a year ago.

The health ministry said the man who had arrived earlier Sunday in the regional capital had been quickly transported to an Ebola treatment center. Authorities said they had tracked down all the passengers on the bus the man took to Goma from Butembo, one of the towns hardest hit by the disease.

"Because of the speed with which the patient was identified and isolated, and the identification of all the other bus passengers coming from Butembo, the risk of it spreading in the rest of the city o...