Protesters had accused the police of using the outlawed device against crowds as hundreds of thousands gathered in Belgrade. The protests were described as the largest in Serbia's history.Serbia' s president Aleksandar Vucic has denied that his police forces used a banned' sonic weapon' to disperse protesters in Belgrade.

At least 100,000 people descended on Belgrade on Saturday for a mass rally seen as a culmination of months-long protests against Serbia’s populist President Aleksandar Vucic and his government.

The rally was seen as a culmination of months-long protests against the Serbian President and his government, which both denied the allegation