Serbia is introducing visas for Tunisian and Burundian citizens, responding to EU criticism that the country is a backdoor into the bloc for migrants.
Turks and Indians are expected to join them shortly.
In October, the EU Commission said it would consider suspending Serbia’s own visa-waiver rights to the bloc if it failed to curtail migrants using it as a gateway to the European Union.
President Aleksandar Vucic held talks with Austrian and Hungarian leaders on Wednesday, when he agreed to deploy more police resources along Serbia’s southern border, a major route for undocumented migrants.
