Serbian officials are denying that the country’s security forces illegally used a military-grade sonic weapon to disperse and scare protesters at a huge anti-government rally in the capital a day earlier.
Archived version: https://archive.is/newest/https://apnews.com/article/serbia-protest-sonic-weapon-8502587e5849997175a5ea02f98d2e19
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BS. Dozens of countries have them and the US has used them in the past on protests already.
https://en.wikipedia.org/wiki/Long-range_acoustic_device
https://en.wikipedia.org/wiki/Sonic_weapon