At least 30 people have died since the start of May in one camp for displaced civilians in northeastern Congo, a death rate that camp officials said was unprecedented, with some confirmed to have died from Ebola in a sign the disease could be spreading fast there.It was not possible to confirm the causes of all the deaths because patients or their relatives in Kigonze camp in Bunia – the epicentre of the Ebola outbreak in Democratic Republic of Congo – had until Thursday refused testing, a...