Nigeria has confirmed that a Liberian man who died in business hub Lagos on Friday was tested positive for Ebola virus, according to Nigerian Health Minister Onyebuchi Chukwu.

The Liberian in his 40s collapsed when arrived in Lagos on Sunday and was suspected to be an Ebola virus carrier. He was then taken from the airport to a local hospital for treatment and test.

Lagos is the most populous city in Nigeria with a population of about 20 million, and it is also the second fastest-growing city in Africa.