Genetic sequencing indicates a virus of Nigerian origin, imported from Kismayo, Somalia; however, it is not possible to determine how long the virus has been circulating in Kenya.

That will also give stadium officials a few days to find a recording of Nigeria's national anthem so the team can be properly introduced for its next Olympics match.

Abdulmutallab was educated in Togo before studying engineering at University College, London and had lived outside Nigeria for some time.