Tens of thousands of students and other opponents of Serbia's populist president are converging on the northern city of Novi Sad for the massive commemoration of the victims of a tragedy a year ago that killed 16 people.
Ahead of the commemorative rally, momentum has been building in favor of opposition demands for major changes in the Balkan country, after nearly a year of student-led anti-government protests that have seriously shaken President Aleksandar Vucic and his firm grip on power.
