Riot police clash with protesters in Belgrade, Serbia, Sunday, March 17, 2019.
Police said they were attacked and arrested several demonstrators. The interior minister said the protest leaders must be "processed" as soon as possible.
The crowd, however, chanted "He is finished!" at Vucic, which was the slogan of the October 2000 uprising that led to the ouster of late Serbian strongman Slobodan Milosevic, architect of the country's bloody wars with its neighbors during the early 1990s.
Serbia's weekly anti-government protests began after thugs beat up an opposition politician in November. A former extreme nationalist, Vucic now says he wants to lead Serbia into the European Union.