Protesters waving flags, chanting slogans and blowing whistles massed in the Serbian capital on Saturday to join the latest in a series of student-led demonstrations that have mounted an unprecedented challenge to President Aleksandar Vučić’s government.

Traffic was at a halt across the city and the main boulevards and intersections were completely blocked as masses of protesters headed for the city centre on foot.

As well as students and members of the public, farmers driving tractors and large groups of bikers also joined the protest. Many of the protesters chanted “Pump it!”, a slogan of the ongoing protests.