"Nigeria's striker Enyimba Ezenwa Otorogu has just signed an agreement with Club Africain till June 2011," the club said in a statement posted on their site.
CA, who are placed third in the Tunisian top division league with 25 points, are one of their country's oldest club with very passionate supporters.
Otorogu shone at this year's Caf Champions League with Nigerian club Enyimba, so much so that he scored his team's goal when they lost to Club Africain in a qualifying round for the Champions League.
His performances will attract interest from several top African clubs including Ajax Cape Town and Al Hilal of Sudan.
He also tried out with Danish champions Aalborg.