Kyiv shootout between Ukrainian spy agencies stems from disputed arrest of Russian fighter

Gunfire erupted between Ukraine's SBU and HUR in central Kyiv on 3 September 2026 after the SBU arrested Kaplunov, a Russian national fighting for Ukraine under HUR. The SBU says it foiled an FSB recruitment plot; HUR and Kaplunov's lawyer call the detention illegal and his video confession coerced. Three HUR officers were injured. Zelenskyy vowed investigation.