Thousands of anti-government protesters marched again in Serbia on Monday with baton-wielding riot police chasing them in downtown Belgrade, prompting Serbia's populist President Aleksandar Vucic to reiterate his pledge of a planned major crackdown against the demonstrators.

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.

Anti-corruption protesters in Serbia set fire to the Valjevo offices of the country's ruling political party, city leaders said, amid clashes sparked by the deadly collapse of a rail station in November.