Gabon has suspended issuing visas to European travellers after its citizens were included in the EU ban list.
Gabonese foreign affairs ministry said it had applied the "the principle of reciprocity".
The nationals of the 27 EU member states will not be allowed into Gabon.
Minister Alain Claude Bilie By Nzé sent a circular to diplomatic missions communicating the change in issuance of visas: Bilie-By-Nze@BilieByNze Gabon has recorded 5,394 cases of coronavirus and 42 deaths.
The EU listed only 14 safe countries whose nationals were allowed into member states as a result of the coronavirus pandemic.
Included on the list are four African countries: Algeria, Morocco, Rwanda and Tunisia.