Tens of thousands of protesters filled the streets of Serbia’s capital over the weekend, the culmination of more than four months of demonstrations against the government of President Aleksandar Vucic and what they see as its slow response to a deadly train station collapse in November.

The rally on Saturday in the capital, Belgrade, came as protests have spread to towns around the country and have drawn increasingly insistent calls that President Aleksandar Vucic step aside.

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.