Where did the Serbian "lj" come from in the Russian report and other illogicalities

The Security Information Agency (BIA) published on its website a report by the Russian Federal Security Service (FSB) on the use of the so-called sound cannon in Serbia. As soon as the text was published, mistakes and illogicalities were noticed, which is why the question of where the report was written - in Moscow or in Belgrade - is open.

The BBC was unable to confirm the authenticity of the document, published in Russian and Serbian, without date, memorandum or author

The report of the Russian Federal Security Service (FSB) that the regime in Serbia hired to conduct an investigation into the use of a sound cannon or other acoustic device during the protest of citizens in Belgrade on March 15 is a topic that is also being addressed by the Russian media, in the way that Serbian President Aleksandar Vucic presented it to the public yesterday in Serbia.

Russian Ambassador to Serbia Alexander Botan-Kharchenko said in an interview with RTVI that there is no reason to doubt the FSB's report on the “sound gun”.