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Sevastopol strikes and Kyiv's new ICC office

Summary
A look back at the security reports surrounding 18 September 2023, from the Black Sea Fleet to the Zaporizhzhia plant area and the war crimes investigation.
What was the security picture in Ukraine on 18 September 2023? It was shaped by reports from the preceding days, which pointed to pressure on Russian naval assets in Crimea, drone activity near a nuclear plant and a new step in international war crimes work.
Strikes on Sevastopol
On 13 September 2023, Russia said at least 24 people were injured in Ukrainian missile strikes on Sevastopol and that two boats were damaged. Ukraine claimed it had destroyed the Russian landing ship Minsk, a KC-701-class patrol boat and the submarine B-237 of the Black Sea Fleet.
B-237 is the Rostov-na-Donu, a Project 636.3 diesel-electric attack submarine. It was commissioned on 26 December 2014 and joined Russia's Black Sea Fleet.
Drones near Zaporizhzhia
Also on 13 September 2023, the head of Rosatom, Alexei Likhachev, said Ukraine had launched a drone strike on Enerhodar, near the Zaporizhzhia nuclear plant. He said all six drones were destroyed. The claim came from the Russian side.
A new ICC office in Kyiv
On 14 September 2023, the International Criminal Court opened a field office in Kyiv as part of its war crimes investigations. It became the largest ICC office outside its headquarters in The Hague, Netherlands.
Taken together, these reports from 13 and 14 September 2023 show a conflict running on several tracks at once: military action in Crimea, claims of attacks near a nuclear facility and a lasting international legal presence in the Ukrainian capital.