Five players, including new signings Achraf Lazaar, Mohamed Diame and Christian Atsu will be unavailable for up to five Championship matches.
The Nottingham Forest striker looks set to represent the country of his birth.
Ghanaian winger Mubarak Wakaso has returned to Celtic after the Africa Cup of Nations ended.
Celtic winger Wakaso Mubarak scored for Ghana in their 3-0 Africa Cup of Nations win over Equatorial Guinea.
Christian Atsu struggled in Ghana's 1-0 win against Algeria.
The Africa Cup of Nations is poised to kick off later this week, but who should West Ham be scouting at the competition?
With Morocco no longer set to host the 2015 African Cup of Nations, the best result could be to move the tournament outside of Africa.
Arsenal, Reading, and Liverpool have all been linked with Nigeria striker Emmanuel Emenike. We took a closer look.
Wakaso Mubarak came off the bench to score twice as Ghana progressed to the Afcon semi-final stage, beating Cape Verde on Saturday.
The African Nations Cup begins at the end of this week in South Africa. Get ready to embrace the vuvuzela once again...