The rapid spread of Ebola in the Democratic Republic of Congo has created a "deeply alarming" situation, the medical charity Médecins Sans Frontières (MSF) has warned.
Speaking two weeks on from the outbreak being declared, MSF deputy director Dr Alan Gonzales said never before had "so many cases" been recorded so soon.
His comments came as the head of the World Health Organization (WHO), Dr Tedros Adhanom Ghebreyesus, visited the eastern Congolese province of Ituri - the worst-hit area - to oversee virus containment efforts.
There are now more than 1,000 suspected Ebola cases in the DR Congo, and at least 246 deaths. Neighbouring Uganda has reported nine confirmed cases and one death.
"Two weeks after the declaration of the Ebola disease outbreak in Ituri Province, the situation is deeply alarming," Gonzalez said in a statement on Saturday.
"Never before has an Ebola outbreak recorded so many cases so soon after its declaration," he said, stressing his teams on the ground were "witnessing a response that has not yet caught up to the rapid spread of the epidemic".
"The reality today is that nobody knows the true scale and severity of this outbreak. New suspected cases are being reported daily, yet hundreds of samples remain untested."