Large crowds of flag-waving protesters converged after meeting up at several agreed-on protest venues in various parts of Belgrade, which was placed on high alert.

Tens of thousands of protesters converged in Serbia’s capital Belgrade Saturday in what could be the largest in a series of anti-corruption demonstrations that have upended the Balkan country in recent months.

Huge crowds are converging on downtown Belgrade for a major rally against populist President Aleksandar Vucic and his government.