All ports of entry into Nigeria have been placed on "red alert" over the Ebola outbreak, health officials said, after a Liberian man died of the disease in Lagos.
"All ports of entry into Nigeria, including airports, seaports and land borders, are placed on red alert," Nigerian health minister Onyebuchi Chukwusaid said.
"Ministry of health specialists have been positioned in all entry points. Active surveillance has also been stepped up."
Mr Chukwusaid said an investigation was underway to see whether the 40-year-old Liberian national came into contact with anyone else.
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