BELGRADE, March 18. /TASS/. Serbian President Aleksandar Vucic does not rule out radicalization of protests in the country.

"They are unable to achieve victory in the parliamentary elections, so we expect harsher protest actions," Vucic told the media on Monday.

During last Saturday’s street march several dozen people forced their way into the building of Serbia’s national television broadcaster. Police was called to make the attackers leave the building. Vucic addressed the nation with a warning that all rioters would be brought to justice.

During the presidential message protesters burst through police cordons to surround the presidential residence to declare they would not let the president out. Crack police were moved in. The demonstration’s organizers curtailed the rally to move to the police station where the protesters detained previously had been taken.