Watford striker, Odion Ighalo, and Israel-based midfielder, John Ogu, were among the earliest overseas-based players to arrive at the Super Eagles camp on Tuesday ahead of the June 3 arrival deadline given by team's head coach, Stephen Keshi.
Former Switzerland junior international, Steve Okoh, is also in camp in preparation for the 2017 Africa Cup of Nations qualifier against Chad in Kaduna.
Most of the invited players are expected to be in the Bolton White Apartments, Abuja camp by Wednesday night, giving the team ample time to train together.
The Eagles face Chad in Kaduna on 13 June in their opening 2017 AFCON qualifier.
The match will be the team's first competitive fixture since the return of Keshi, who was initially relieved of the job for the side's failure to qualify for the 2015 AFCON.
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