Swedish medical authorities are investigating a possible case of Ebola at a hospital in Stockholm.
Media reports say a man who recently traveled to a "risk area'' for the virus is suffering from a fever and is being treated in an isolation unit.
They released no other details about the case.
Last week, Senegal became the fifth country linked to the Ebola outbreak in West Africa, which has killed more than 1,500 people this year, mostly in Guinea, Liberia and Sierra Leone.
The World Health Organization has warned that the 6-month-old outbreak is escalating, with 40 percent of the cases occurring within the last month.