BUTEMBO, Congo: Militia members attacked an Ebola treatment center hours after another attack killed a staffer with the World Health Organization, a Congolese official said Sunday. Butembo city’s Deputy Mayor Patrick Kambale Tsiko told The Associated Press the attackers armed with machetes tried to burn down the center in Katwa district overnight. Military and police guarding the center killed one militia member and detained five others, he said. Such violence has deeply complicated efforts to contain what has become the second-deadliest Ebola virus outbreak in history, with the number of new cases jumping each time treatment and prevention work is disrupted.AP