Serbian President Aleksandar Vucic has announced tough measures against antigovernment protesters following days of riots challenging his rule.

Serbia's police say they have detained scores of demonstrators who took part in anti-government protests throughout the country this week.

Serbian police say nearly 50 protesters have been detained and dozens of people injured during clashes at anti-government protests in Serbia against the populist rule of President Aleksandar Vucic.

Serbia's president on Sunday vowed a "strong" response to anti-government protests, after nearly a week of violent clashes involving his supporters, police and demonstrators across the country.The mostly peaceful demonstrations deteriorated earlier this week when large groups of pro-government supporters — many masked and some armed with batons and fireworks — attacked protesters.

Angry protesters clashed with police in a town in western Serbia and in the capital Belgrade on Saturday as tensions soared further in the Balkan nation following days of violent demonstrations. Wearing scarves over their faces and chanting slogans against President Aleksandar Vucic,

The sometime actor and former Yugoslavian soccer player sold the eatery, which last year celebrated its 60th anniversary, to current owner Sonja Perencevic in 2009 before moving to Belgrade, Serbia.

Fresh clashes erupted late Saturday between protesters and riot police in Serbia's capital Belgrade and other cities, on the fifth consecutive night of unrest.