Seventeen Ebola patients are still missing after they ran away from a quarantine centre in Liberia when it was attacked by armed men.
Witnesses say a gang looted the facility in the capital.
29 people were receiving preliminary treatment there before being taken to hospital.
Meanwhile. reporters in Spain say a young Nigerian man has tested negative for Ebola.
Officials put their alert protocols in place after he was rushed to hospital in Alicante with symptoms last night.
The alert comes a week after a Spanish priest who contracted the disease while working in Liberia died in hospital in Madrid.
