# Federal Security Service of the Russian Federation (FSB)

The Russian security service that the Serbian authorities invited to examine the “sound cannon”. According to a report read out by Vučić and published by BIA, it concluded that Serbian police sound devices were not used on 15 March 2025; prosecutor Radovan Lazić said an unsigned report cannot serve as evidence in criminal proceedings.

## Affairs

- [“Sound cannon” at Belgrade protest](https://odgovornost.rs/en/afere/zvucni-top-15-mart): According to Vučić's reading of the report, it concluded that the Serbian police's sound devices had not been used

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Source: Odgovornost, https://odgovornost.rs/en/organizacije/fsb  
As of: 6 Nov 2026  
Licence: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/deed.en)