A worker with the World Health Organisation has fallen ill from Ebola, WHO told CNN.
The health worker is in Sierra Leone and receiving care, according to the organisation. No further details were given immediately.
Separately, a British worker infected with the virus has been evacuated, the Department of Health announced.
WHO is working to ensure the intl health worker receives best care possible incl the option of medical evac to another care facility #Ebola
More than 160 staff will work in a UK-funded facility in Sierra Leone which is due to open in October.
UK trials of a vaccine for the Ebola virus began today - but some experts complain that the response has been a long time coming.
A Swansea doctor who took leave to treat Ebola patients in Africa, is back on the wards after three weeks in isolation.