President Muhammadu Buhari at the APC rally in Rivers
It was learnt that the victims were trampled upon following a stampede at the stadium.
Those that appeared to be breathing were rushed to a nearby hospital for medical attention by available ambulances.
President Muhammadu Buhari had taken his re-election campaign on the platform of the APC to Rivers State, south-south Nigeria.
In attendance at the rally is the National Chairman of the party Adams Oshiomhole, Minister of Transportation Rotimi Amaechi, Tonye Cole, Senator Godswill Akpabio, among other party members.
See mammoth crowd of supporters from the rally: