The parties involved in a Kyiv shootout on Wednesday, Sept. 2, have offered differing accounts of the incident – one accusing the other of a Russian assassination plot, while the other alleging illegal kidnapping.Initial reports suggest that officers from the Security Service of Ukraine (SBU) engaged in a firefight with officers from Ukraine’s Military Intelligence (HUR) on the left bank of Kyiv on Wednesday over the disappearance of Stepan Kaplunov, deputy commander of the Russian Volunteer Corps (RDK).JOIN US ON TELEGRAMFollow our coverage of the war on the @Kyivpost_official.President Volodymyr Zelensky condemned the incident and ordered an investigation by the State Bureau of Investigation (DBR) alongside the Prosecutor General’s Office.The SBU has since accused Kaplunov of Russian collaboration, while Kaplunov has accused the SBU of kidnapping him illegally and fabricating the Russian plot as a cover-up.Kyiv Post cannot independently verify the authenticity of reports from all sides.Who are the SBU, HUR, and RDK?The SBU is primarily responsible for domestic intelligence and counterterrorism activities, whereas HUR, as part of the military, is primarily tasked with foreign intelligence and reconnaissance.The RDK is a military unit under HUR made up of Russian nationals fighting on behalf of Ukraine against Moscow.SBU accuses Kaplunov of Russian collaborationSoon after the incident went public, the SBU and the Prosecutor General’s Office published an identical press release accusing fighters from “one of the units of the Defense Forces of Ukraine” of hindering its investigation.