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.

Hundreds of thousands of people descended on Serbia's capital on Saturday to protest over the deaths of 15 people in a railway station collapse. While the government put attendance at 107,000 across Belgrade, an independent monitor said 325,000 - if not more - had gathered, making it Serbia's largest protest ever.

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

Serbian officials denied Sunday that the country's security forces used a military-grade sonic weapon to disperse and scare protesters at a huge anti-government rally in the capital. Rights groups claimed that the widely banned acoustic weapon was used during the protest Saturday.

By bne IntelliNews The Serbian police have been accused of using a sonic cannon against protesting students on March 15 when the largest protest against strongman Aleksandar Vucic was held in the capital Belgrade.