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.

Amidst vehement denials by authorities, calls are rising for an independent investigation into claims that a prohibited sonic weapon was used on protesters at an anti-corruption rally in Serbia. Allegations of the weapon’s use continue to ignite political tension,

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