SBU and GUAR clash over detained RDK commander

Who is Stepan Kaplunov, who ended up at the center of the story about a firefight between Ukrainian intelligence services in Kyiv.

Consensus

Stepan Kaplunov, deputy commander of the Russian Volunteer Corps (RDC), was abducted in Kyiv on August 23.
He was detained by the SBU and held for about 10 days.
A shootout occurred between SBU and GUAR personnel in Kyiv during a search operation at Kaplunov's apartment.
Three GUAR operatives were injured in the incident.
Kaplunov was later released.
The SBU claimed the operation was to prevent an FSB-planned terrorist attack.
The GUAR initially claimed a joint operation with the SBU but later removed the statement.
Ukrainian President Zelensky called the incident a 'shameful situation' and ordered an investigation.
High-ranking SBU official Oleg Khramov was dismissed following the incident.
Both sides used Russian language during the confrontation.

One GUAR member was killed during the shootout. — tg_rybar
The conflict was primarily driven by competition over financial control of call centers, with both agencies acting as economic actors. — tg_rybar
Kaplunov served in the Russian military, including in Syria, and was previously under investigation by the FSB in 2017. — tg_agentstvonews
The SBU and GUAR were engaged in a long-standing rivalry that began in 2023. — tg_rybar
The incident was framed as a 'battle for the soul' (вырусь) between the two agencies. — tg_rybar