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.

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.

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.