Serbia's president announced Sunday more arrests of anti-government protesters following clashes with police at a massive rally demanding an early parliamentary election. Dozens have already been detained.

Aleksandar Vucic, at a press conference, accused organizers of Saturday's student-led protest in the capital, Belgrade, of inciting violence and attacks on police, urging legal prosecution. He also criticized "terrorists and those who tried to bring down the state,” singling out University of Belgrade's head dean, Vladan Djokic, who was among the protesters.

Tens of thousands of people attended the rally held after nearly eight months of persistent dissent, which has rattled Vucic’s firm grip on power in the Balkan country. Protesters also declared the current populist government “illegitimate” and laid the responsibility for any violence on the government.

Clashes with riot police erupted after the official part of the rally ended. Police used pepper spray, batons and shields while protesters threw rocks, bottles and other objects.

Police said on Sunday that 48 officers were injured while 22 protesters sought medical help. Out of 77 people detained, 38 remain in custody, most of whom are facing criminal charges, said Interior Minister Ivica Dacic.

“There will be more arrests,” Vucic said. “Identification of all individuals is underway.”

The protests started after a renovated rail station canopy collapsed in November, killing 16 people. Many in Serbia blamed the tragedy in the northern city of Novi Sad on corruption-fueled negligence in state infrastructure projects.

Vucic has repeatedly rejected an immediate snap vote instead of the one planned for 2027.

“Serbia won. You cannot destroy Serbia with violence,” Vucic said Sunday. “They consciously wanted to spur bloodshed. The time of accountability is coming.”

Critics say Vucic has become increasingly authoritarian since coming to power over a decade ago, stifling democratic freedoms while allowing corruption and organized crime to flourish. He has denied this.

Serbia is formally seeking European Union entry, but Vucic's government has nourished its relations with both Russia and China.