Serbian human rights organizations have escalated their investigation of an alleged sonic weapon use during a March 15 protest to the European Court of Human Rights, presenting over 4,000 testimonies from affected demonstrators [1].

The incident occurred during an anti-government protest in Belgrade when a mysterious sound disrupted a commemorative silence, causing panic among thousands of peaceful demonstrators. Witnesses described hearing 'a sound rolling toward us' that lasted 2-3 seconds, triggering a mass stampede [1][2].

Serbian authorities initially denied possessing any sonic weapons, but later admitted owning U.S.-made Long Range Acoustic Devices (LRAD) after photographic evidence emerged. Interior Minister Ivica Dacic maintains these are only used as warning devices and were not deployed during the protest [3].

The manufacturer, Genasys, stated on social media that available video and audio evidence does not support the use of their LRAD device during the incident [4]. However, hundreds of protesters reported symptoms including headaches, nausea, and ear pressure following the event [5].

Independent experts have questioned the official narrative. Thomas Withington, an electronic warfare specialist from the Royal United Services Institute, noted the unusual nature of the crowd's synchronized panic response [6].

The European Court of Human Rights has given Serbia until the end of March to respond to the allegations [1]. Meanwhile, President Aleksandar Vucic's government has invited both the FBI and Russia's FSB to investigate the incident [7].