The arrests came amid reports of police brutality and excessive use of force during the unrest.
The three days of clashes between the police and loyalists of autocratic president Aleksandar Vucic on one side and the anti-government protesters on the other left dozens injured or detained.
The unrest in the capital, Belgrade, and throughout Serbia this week marked a serious escalation of more than nine months of largely peaceful demonstrations led by Serbia’s university students that have shaken Mr Vucic’s firm grip on power in the Balkan country.
Another protest, under the slogan “Let’s show them we are not a punching bag”, was held on Friday night throughout Serbia.
Police deployed armoured vehicles in parts of the capital as protesters faced off against riot police separating them fro