A former Ukrainian submarine commander who defected to Russia was killed in an explosion in Sevastopol, with unconfirmed reports identifying the victim as a Russian serviceman. This incident follows other Ukrainian military actions, including the destruction of a Russian command post and claims of damaging air defense systems in Crimea.

Ukrainian President Volodymyr Zelenskyy visited Belgrade, Serbia, meeting with President Aleksandar Vucic to discuss humanitarian aid, trade, and Ukraine's path to the EU. Zelenskyy also announced an agreement with the U.S. for monthly deliveries of interceptor missiles, though he noted they are insufficient to meet Ukraine's needs.