Calls were mounting in Serbia on Monday for an independent investigation into reports that security forces used a prohibited sonic weapon on crowds at a huge peaceful anti-corruption rally last weekend,

Serbian officials denied Sunday that security forces used a military-grade sonic weapon to disperse and scare protesters at a huge anti-government rally in the capital. Opposition officials and Serbian rights groups claimed the widely banned acoustic weapon that emits a targeted beam to temporarily incapacitate people was

Serbian officials have denied allegations security forces deployed a military-grade Long Range Acoustic Device.