Thousands of anti-government protesters are back on the streets of Serbia after two days of clashes with loyalists of populist President Aleksandar Vucic and riot police that left dozens injured or detained.

Protests against the government of President Aleksandar Vučić in Serbia saw a fourth consecutive day of violence on Saturday night. The most severe riots occurred in the central town of Valjevo, where opponents of the government set fire to the office of Vučić's Serbian Progressive Party (SNS) and damaged buildings of the city administration and the local public prosecutor's office.

After more than nine months of largely peaceful anti-corruption protests, Serbia’s streets have erupted in clashes between riot police, student-led demonstrators and masked bands of ruling party loyalists.

Protests erupted across Serbia, targeting the ruling Serbian Progressive Party amid allegations of corruption. Offices were destroyed in Novi Sad, and clashes occurred with police and supporters of President Aleksandar Vucic in Belgrade.

Clashes between rival groups of protesters in Serbia flared again today, police said, as months of anti-government demonstrations boiled over into street violence this week. A wave of anti-corruption protests has gripped Serbia since November,