At least 100,000 people have converged in Belgrade for a massive rally in the Serbian capital seen as a culmination of months-long protests against populist President Aleksandar Vucic.

The rally was part of a nationwide anti-corruption movement that erupted after a concrete canopy collapsed at a train station in Serbia's north in November, killing 15 people.

Tens of thousands of protesters descended on Serbia's capital Belgrade on Saturday in one of the largest rallies in decades, with students and workers facing riot police and supporters of President Aleksandar Vucic. Alice Rizzo reports. Protesters assemble for mass demonstration against Serbia's government

Calls are mounting in Serbia for an independent investigation into reports that security forces used a sonic weapon on crowd at against a huge anti-corruption rally last weekend.

Serbian officials are denying that security forces illegally used a military-grade sonic weapon to disperse and scare protesters at a huge anti-government rally