At least 131 deaths and over 500 suspected cases have been reported in the latest Ebola outbreak in eastern Congo, the Congolese health ministry said Tuesday as the World Health Organization's head expressed concern over the "scale and speed of the epidemic."

The head of the WHO said he was "deeply concerned by the scale and speed of the epidemic."

The World Health Organization is sounding the alarm over the “scale and speed” of a deadly Ebola outbreak sweeping eastern Democratic Republic of Congo.