Panic during anti-graft demo in Serbian capital as protestors claim use of sonic weapon

Thousands of demonstrators disperse in a panic during a massive anti-corruption rally in Belgrade on 15 March. The crowd, holding a 15-minute silence during the incident, claim authorities used a type of sonic weapon, referred to in the video caption as: "Sound cannon used on citizens while they pay their respects to those killed." Serbia's police and defence ministries, the security agency, the president, and the prime minister all firmly deny the accusation and have announced an investigation. Several of the demonstrators have reported health problems since the incident.