The man posted an electronic announcement on public PCs at a social establishment in Kyiv, urging the creation of a self-proclaimed republic.
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As part of a pretrial investigation, SBU officers are checking the suspect's acquaintances.
The man, who is a former employee of a Kyiv-based municipal establishment, is charged under Part 2 of Article 110 of the Criminal Code of Ukraine (attempt to violate the territorial integrity and inviolability of Ukraine).
The investigation is currently underway.