A Spanish nurse has contracted Ebola in what is believed to be the first case of the disease being contracted outside west Africa.
The nurse tested positive for the virus in initial tests, according to Spanish media. Doctors are awaiting final tests.
The woman works at Madrid's La Paz-Carlos III hospital where two missionaries died after being repatriated from Africa with the disease.
Health Minister Ana Mato said an emergency protocol had been put in place and authorities were working to establish the source of the contagion.
Spanish priest Miguel Pajares, 75, was infected with ebola in Liberia and died at the hospital on 12 August.
Another Spanish missionary, Manuel Garcia Viejo, 69, was repatriated from Sierra Leone and died at the hospital on 25 September.
A Spanish health official said 30 medical staff who treated the two priests are being monitored. Both were members of a Roman Catholic group that runs a charity working with ebola victims in Africa.
The nurse is said to have been admitted to hospital on Monday morning with a high fever.
Approximately 3,400 people have died in this outbreak of Ebola – the most serious in the history of the disease.
Meanwhile, Barack Obama has revealed the US is looking at extra measures to screen airline passengers arriving from the worst-hit countries:
